diff --git a/CHANGELOG.md b/CHANGELOG.md
index ccb77732ab..7da8cab7c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -63,6 +63,7 @@
 - Cherry-pick upstream v1.26.4: walk git log context error handling — regression fix (#38185)
 
 ### Fixed
+- Repo metadata `org` is now **derived from the org profile** (the repository owner) instead of being stored/editable, so it can never drift when an organization is renamed. The `org` column is dropped from `repo_manifest` (migration #368) and the field is derived on read via `Repository.DerivedOrgName` (owner display name, falling back to the handle) across the metadata API, the Settings → Metadata page (now read-only), and the Joomla update-server feed. The API `PUT` and MCP `metadata_update` now ignore `org` (read-only, like the already-derived `display_name`) (#771)
 - Fork server binary now compiles: `routers/api/v1/api.go` called `organization.HasOrgOrUserVisible`, which had been renamed to `IsOwnerVisibleToDoer`; the one missed call site broke `go build` of the entire `routers/api/v1` package (CI's Lint & Validate does not run a full build, so it went unnoticed) (#735)
 - Dev deploy workflow: the build/deploy step referenced runner-side values as `\$TAG` / `\$REGISTRY_TOKEN` inside an unquoted SSH heredoc, deferring expansion to the remote shell where those names are unset — the Docker tag collapsed to an empty `mokogitea:` and every dev deploy failed with `invalid reference format`. Runner values are now injected via an ssh env-prefix and the heredoc is quoted so each `$var` expands in exactly one place (#737)
 - Repaired unit-test compile and `go vet` failures: `CryptoRandomInt/String/Bytes` now return two values (updated `modules/util/util_test.go`), removed a redundant `&&` condition in `issue_comment.go`, and cleaned up isolated integration-test compile errors (#736)
diff --git a/models/migrations/migrations.go b/models/migrations/migrations.go
index 24ff05cc46..5a0eada68b 100644
--- a/models/migrations/migrations.go
+++ b/models/migrations/migrations.go
@@ -445,6 +445,7 @@ func prepareMigrationTasks() []*migration {
 		newMigration(365, "Add org repo defaults table", v1_27.AddOrgRepoDefaultsTable),
 		newMigration(366, "Add org email domain policy table", v1_27.AddOrgEmailDomainPolicyTable),
 		newMigration(367, "Add user allowlists to org protected branch", v1_27.AddUserAllowlistsToOrgProtectedBranch),
+		newMigration(368, "Drop org from repo manifest (derived from org profile)", v1_27.DropOrgFromRepoManifest),
 	}
 	return preparedMigrations
 }
diff --git a/models/migrations/v1_27/v369.go b/models/migrations/v1_27/v369.go
new file mode 100644
index 0000000000..54585668f0
--- /dev/null
+++ b/models/migrations/v1_27/v369.go
@@ -0,0 +1,19 @@
+// Copyright 2026 Moko Consulting <hello@mokoconsulting.tech>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package v1_27
+
+import (
+	"code.mokoconsulting.tech/MokoConsulting/MokoGitea/models/migrations/base"
+
+	"xorm.io/xorm"
+)
+
+// DropOrgFromRepoManifest removes the org column from repo_manifest. The
+// organization is now derived from the org profile (repository owner) on read
+// rather than stored, so it never drifts on rename. See issue #771.
+func DropOrgFromRepoManifest(x *xorm.Engine) error {
+	sess := x.NewSession()
+	defer sess.Close()
+	return base.DropTableColumns(sess, "repo_manifest", "org")
+}
diff --git a/models/repo/repo.go b/models/repo/repo.go
index ab7523e54e..cf99169a49 100644
--- a/models/repo/repo.go
+++ b/models/repo/repo.go
@@ -486,6 +486,23 @@ func (repo *Repository) LoadOwner(ctx context.Context) (err error) {
 	return err
 }
 
+// DerivedOrgName returns the organization name derived from the org profile
+// (the repository owner). It prefers the owner's display name (FullName) and
+// falls back to the owner handle (Name / OwnerName). The organization is always
+// derived from the profile rather than stored, so it never drifts on rename.
+func (repo *Repository) DerivedOrgName(ctx context.Context) string {
+	if err := repo.LoadOwner(ctx); err != nil || repo.Owner == nil {
+		return repo.OwnerName
+	}
+	if repo.Owner.FullName != "" {
+		return repo.Owner.FullName
+	}
+	if repo.Owner.Name != "" {
+		return repo.Owner.Name
+	}
+	return repo.OwnerName
+}
+
 // MustOwner always returns a valid *user_model.User object to avoid
 // conceptually impossible error handling.
 // It creates a fake object that contains error details
diff --git a/models/repo/repo_manifest.go b/models/repo/repo_manifest.go
index 47f13cfc78..8eb7f947b3 100644
--- a/models/repo/repo_manifest.go
+++ b/models/repo/repo_manifest.go
@@ -23,8 +23,10 @@ type RepoMetadata struct {
 	RepoID int64 `xorm:"UNIQUE INDEX NOT NULL 'repo_id'"`
 
 	// identity section
+	// NOTE: organization is intentionally NOT stored here. It is derived from
+	// the org profile (repository owner) on read via Repository.DerivedOrgName,
+	// so it can never drift from the owner on rename. See issue #771.
 	Name        string `xorm:"TEXT 'name'"`                // project name
-	Org         string `xorm:"TEXT 'org'"`                 // organization name
 	Description string `xorm:"TEXT 'description'"`         // project description
 	LicenseSPDX string `xorm:"VARCHAR(50) 'license_spdx'"` // SPDX identifier, e.g. "GPL-3.0-or-later"
 	LicenseName string `xorm:"TEXT 'license_name'"`        // human-readable license name
diff --git a/routers/api/v1/repo/manifest.go b/routers/api/v1/repo/manifest.go
index 642eb76d5b..017d697b9a 100644
--- a/routers/api/v1/repo/manifest.go
+++ b/routers/api/v1/repo/manifest.go
@@ -14,7 +14,7 @@ import (
 // apiMetadata is the JSON representation of a repo manifest.
 type apiMetadata struct {
 	Name             string `json:"name"`
-	Org              string `json:"org"`
+	Org              string `json:"org"` // read-only, derived from the org profile (repo owner)
 	Description      string `json:"description"`
 	LicenseSPDX      string `json:"license_spdx"`
 	LicenseName      string `json:"license_name"`
@@ -83,14 +83,14 @@ func GetRepoMetadata(ctx *context.APIContext) {
 		// Return defaults from repo metadata.
 		ctx.JSON(http.StatusOK, &apiMetadata{
 			Name:        ctx.Repo.Repository.Name,
-			Org:         ctx.Repo.Repository.OwnerName,
+			Org:         ctx.Repo.Repository.DerivedOrgName(ctx),
 			Description: ctx.Repo.Repository.Description,
 		})
 		return
 	}
 	ctx.JSON(http.StatusOK, &apiMetadata{
 		Name:        m.Name,
-		Org:         m.Org,
+		Org:         ctx.Repo.Repository.DerivedOrgName(ctx),
 		Description: m.Description,
 
 		LicenseSPDX:      m.LicenseSPDX,
@@ -157,7 +157,6 @@ func UpdateRepoMetadata(ctx *context.APIContext) {
 		m = &repo_model.RepoMetadata{
 			RepoID:      ctx.Repo.Repository.ID,
 			Name:        ctx.Repo.Repository.Name,
-			Org:         ctx.Repo.Repository.OwnerName,
 			Description: ctx.Repo.Repository.Description,
 		}
 	}
@@ -171,7 +170,8 @@ func UpdateRepoMetadata(ctx *context.APIContext) {
 		}
 	}
 	setStr("name", &m.Name)
-	setStr("org", &m.Org)
+	// org is intentionally ignored: it is derived from the org profile
+	// (repository owner) on read, not stored. See issue #771.
 	setStr("description", &m.Description)
 	setStr("license_spdx", &m.LicenseSPDX)
 	setStr("license_name", &m.LicenseName)
@@ -204,7 +204,7 @@ func UpdateRepoMetadata(ctx *context.APIContext) {
 
 	ctx.JSON(http.StatusOK, &apiMetadata{
 		Name:        m.Name,
-		Org:         m.Org,
+		Org:         ctx.Repo.Repository.DerivedOrgName(ctx),
 		Description: m.Description,
 
 		LicenseSPDX:      m.LicenseSPDX,
diff --git a/routers/web/repo/setting/metadata.go b/routers/web/repo/setting/metadata.go
index 0fe147810c..6bbea3617a 100644
--- a/routers/web/repo/setting/metadata.go
+++ b/routers/web/repo/setting/metadata.go
@@ -35,11 +35,13 @@ func Metadata(ctx *context.Context) {
 		manifest = &repo_model.RepoMetadata{
 			RepoID:      repoID,
 			Name:        ctx.Repo.Repository.Name,
-			Org:         ctx.Repo.Repository.OwnerName,
 			Description: ctx.Repo.Repository.Description,
 		}
 	}
 	ctx.Data["Manifest"] = manifest
+	// Organization is derived from the org profile (repo owner), not stored.
+	// It is displayed read-only. See issue #771.
+	ctx.Data["DerivedOrg"] = ctx.Repo.Repository.DerivedOrgName(ctx)
 
 	// Load repo-scoped custom fields.
 	fields, _ := issues_model.GetCustomFieldsByOwner(ctx, ownerID, issues_model.CustomFieldScopeRepo)
@@ -102,7 +104,7 @@ func saveMetadata(ctx *context.Context) {
 	manifest := &repo_model.RepoMetadata{
 		RepoID:        ctx.Repo.Repository.ID,
 		Name:          ctx.FormString("name"),
-		Org:           ctx.FormString("org"),
+		// org is not stored: it is derived from the org profile on read. See issue #771.
 		Description:   ctx.Repo.Repository.Description,
 		LicenseSPDX:   spdx,
 		LicenseName:   licenseName,
diff --git a/services/updateserver/joomla.go b/services/updateserver/joomla.go
index 6fb24241bd..42c1bd0b09 100644
--- a/services/updateserver/joomla.go
+++ b/services/updateserver/joomla.go
@@ -269,11 +269,8 @@ func GenerateJoomlaXML(ctx context.Context, repo *repo_model.Repository, require
 	phpMinimum := meta.PHPMinimum
 	feedDescription := meta.Description
 
-	// Maintainer and URL always come from the org profile.
-	maintainer := repo.Owner.FullName
-	if maintainer == "" {
-		maintainer = repo.Owner.Name
-	}
+	// Maintainer/organization and URL always come from the org profile.
+	maintainer := repo.DerivedOrgName(ctx)
 	maintainerURL := repo.Owner.Website
 	if maintainerURL == "" {
 		maintainerURL = fmt.Sprintf("%s/%s", baseURL, repo.Owner.Name)
diff --git a/templates/repo/settings/metadata.tmpl b/templates/repo/settings/metadata.tmpl
index 85c14c15c6..5d27acaf09 100644
--- a/templates/repo/settings/metadata.tmpl
+++ b/templates/repo/settings/metadata.tmpl
@@ -18,7 +18,8 @@
 			</div>
 			<div class="field">
 				<label>Organization</label>
-				<input name="org" value="{{.Manifest.Org}}" placeholder="Organization">
+				<input value="{{.DerivedOrg}}" placeholder="Organization" readonly>
+				<p class="help">Derived from the organization profile (repository owner).</p>
 			</div>
 		</div>
 		<div class="three fields">