diff --git a/server/cmd/migrate/migration/version-local/1787983400000_purchase_spec_match_work_item.go b/server/cmd/migrate/migration/version-local/1787983400000_purchase_spec_match_work_item.go
new file mode 100644
index 0000000..fd9e9ef
--- /dev/null
+++ b/server/cmd/migrate/migration/version-local/1787983400000_purchase_spec_match_work_item.go
@@ -0,0 +1,27 @@
+package version_local
+
+import (
+	"runtime"
+
+	goautomigrations "go-admin/app/goauto/migrations"
+	"go-admin/cmd/migrate/migration"
+	common "go-admin/common/models"
+
+	"gorm.io/gorm"
+)
+
+// #149 completes the additive #148 schema change for databases whose earlier
+// migration versions have already been recorded.
+func init() {
+	_, fileName, _, _ := runtime.Caller(0)
+	migration.Migrate.SetVersion(migration.GetFilename(fileName), migratePurchaseSpecMatchWorkItem)
+}
+
+func migratePurchaseSpecMatchWorkItem(db *gorm.DB, version string) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		if err := goautomigrations.Migrate(tx); err != nil {
+			return err
+		}
+		return tx.Create(&common.Migration{Version: version}).Error
+	})
+}
diff --git a/server/cmd/migrate/migration/version-local/1787983400000_purchase_spec_match_work_item_test.go b/server/cmd/migrate/migration/version-local/1787983400000_purchase_spec_match_work_item_test.go
new file mode 100644
index 0000000..fa96576
--- /dev/null
+++ b/server/cmd/migrate/migration/version-local/1787983400000_purchase_spec_match_work_item_test.go
@@ -0,0 +1,66 @@
+package version_local
+
+import (
+	"testing"
+
+	goautomigrations "go-admin/app/goauto/migrations"
+	"go-admin/app/goauto/models"
+	common "go-admin/common/models"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+func TestMigratePurchaseSpecMatchWorkItemUpgradesExistingSchema(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open("file:purchase-match-work-item-upgrade?mode=memory&cache=shared"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	oldModels := make([]any, 0, len(goautomigrations.MigratedModels())-1)
+	for _, model := range goautomigrations.MigratedModels() {
+		if _, isNewModel := model.(*models.PurchaseSpecMatchWorkItem); !isNewModel {
+			oldModels = append(oldModels, model)
+		}
+	}
+	if err = db.AutoMigrate(oldModels...); err != nil {
+		t.Fatal(err)
+	}
+	if err = db.AutoMigrate(&common.Migration{}); err != nil {
+		t.Fatal(err)
+	}
+	if err = db.Create(&common.Migration{Version: "1787885600000"}).Error; err != nil {
+		t.Fatal(err)
+	}
+	if db.Migrator().HasTable(&models.PurchaseSpecMatchWorkItem{}) {
+		t.Fatal("upgrade precondition failed: purchase match work item table already exists")
+	}
+
+	const version = "1787983400000"
+	if err = migratePurchaseSpecMatchWorkItem(db, version); err != nil {
+		t.Fatal(err)
+	}
+	if !db.Migrator().HasTable(&models.PurchaseSpecMatchWorkItem{}) {
+		t.Fatal("purchase match work item table was not created")
+	}
+	for _, index := range []string{
+		"ux_purchase_match_task",
+		"idx_purchase_spec_match_work_item_status",
+		"idx_purchase_spec_match_work_item_next_attempt_at",
+		"idx_purchase_spec_match_work_item_lease_expires_at",
+	} {
+		if !db.Migrator().HasIndex(&models.PurchaseSpecMatchWorkItem{}, index) {
+			t.Fatalf("expected index %s was not created", index)
+		}
+	}
+	var count int64
+	if err = db.Model(&common.Migration{}).Where("version = ?", version).Count(&count).Error; err != nil {
+		t.Fatal(err)
+	}
+	if count != 1 {
+		t.Fatalf("migration version record count = %d, want 1", count)
+	}
+	if err = goautomigrations.VerifyTables(db); err != nil {
+		t.Fatalf("schema verification failed after upgrade: %v", err)
+	}
+}