diff --git a/.changeset/27916-showcase-owner-email-label.md b/.changeset/27916-showcase-owner-email-label.md
new file mode 100644
index 00000000000..282e5a03da0
--- /dev/null
+++ b/.changeset/27916-showcase-owner-email-label.md
@@ -0,0 +1,12 @@
+---
+'@objectstack/example-showcase': patch
+---
+
+Clause-②: no
+Metadata-protocol: none
+
+The showcase's project and invoice objects no longer show two fields called "Owner". Their own `owner`
+text field, which holds the owner's email address, is now labelled "Owner Email" (负责人邮箱 in zh-CN),
+so the platform's `owner_id` user lookup is the one field labelled "Owner" in the field grid, pickers and
+filters. The API name stays `owner`, so seeded rows, flows, permission rules and anything else that
+reads `record.owner` are unchanged.
diff --git a/examples/app-showcase/src/data/objects/invoice.object.ts b/examples/app-showcase/src/data/objects/invoice.object.ts
index cae5cc4acd4..6737e01b7d4 100644
--- a/examples/app-showcase/src/data/objects/invoice.object.ts
+++ b/examples/app-showcase/src/data/objects/invoice.object.ts
@@ -103,8 +103,9 @@ export const Invoice = ObjectSchema.create({
     // permission set scopes invoice SELECT to `owner = current_user.email` (email
     // is the unique, seedable identifier), so a contributor sees only their own
     // invoices; because `showcase_invoice_line` is `controlled_by_parent`, the
-    // lines follow automatically (ADR-0055). Mirror of `project.owner`.
-    owner: Field.text({ label: 'Owner', maxLength: 200 }),
+    // lines follow automatically (ADR-0055). Mirror of `project.owner`, and
+    // labelled apart from the platform-injected `owner_id` lookup ("Owner").
+    owner: Field.text({ label: 'Owner Email', maxLength: 200 }),
     // Region the sale was booked in — the invoice-side target of the Revenue
     // Pulse dashboard's shared "region" filter (framework#2501): accounts map
     // the same filter to their own `sales_region` via `filterBindings`.
diff --git a/examples/app-showcase/src/data/objects/project.object.ts b/examples/app-showcase/src/data/objects/project.object.ts
index fdc0b0126f0..9964f9805f6 100644
--- a/examples/app-showcase/src/data/objects/project.object.ts
+++ b/examples/app-showcase/src/data/objects/project.object.ts
@@ -90,7 +90,9 @@ export const Project = ObjectSchema.create({
     }),
     start_date: Field.date({ label: 'Start Date' }),
     end_date: Field.date({ label: 'Target End Date' }),
-    owner: Field.text({ label: 'Owner', maxLength: 200 }),
+    // The owner's email, as text. Labelled apart from the platform-injected
+    // `owner_id` lookup, which is the one field here labelled "Owner".
+    owner: Field.text({ label: 'Owner Email', maxLength: 200 }),
     // Multi-value fields — the payload for the grid's *bulk-edit* showcase. A
     // multiselect (fixed options) and a multi-user field are exactly the two
     // shapes that, before #2185, the bulk dialog could not set: its people /
diff --git a/examples/app-showcase/src/system/translations/index.ts b/examples/app-showcase/src/system/translations/index.ts
index 82f1e71767a..b0573e19c27 100644
--- a/examples/app-showcase/src/system/translations/index.ts
+++ b/examples/app-showcase/src/system/translations/index.ts
@@ -26,7 +26,7 @@ export const ShowcaseTranslationBundle = {
         fields: {
           name: { label: 'Project Name' },
           account: { label: 'Account' },
-          owner: { label: 'Owner' },
+          owner: { label: 'Owner Email' },
           status: { label: 'Status' },
           health: { label: 'Health' },
           budget: { label: 'Budget' },
@@ -226,7 +226,7 @@ export const ShowcaseTranslationBundle = {
           name: { label: 'Invoice Number' },
           account: { label: 'Account' },
           contact: { label: 'Contact' },
-          owner: { label: 'Owner' },
+          owner: { label: 'Owner Email' },
           status: { label: 'Status' },
           issued_on: { label: 'Issued On' },
           tax_rate: { label: 'Tax Rate (%)' },
@@ -383,7 +383,7 @@ export const ShowcaseTranslationBundle = {
         fields: {
           name: { label: '项目名称' },
           account: { label: '客户' },
-          owner: { label: '负责人' },
+          owner: { label: '负责人邮箱' },
           status: {
             label: '状态',
             options: { planned: '计划中', active: '进行中', on_hold: '已暂停', completed: '已完成', cancelled: '已取消' },
@@ -723,7 +723,7 @@ export const ShowcaseTranslationBundle = {
           name: { label: '发票号' },
           account: { label: '客户' },
           contact: { label: '联系人' },
-          owner: { label: '负责人' },
+          owner: { label: '负责人邮箱' },
           status: { label: '状态' },
           issued_on: { label: '开具日期' },
           tax_rate: { label: '税率 (%)' },