diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53294148..c83d437f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,8 +7,12 @@ Write each change in both `### English` and `### 中文` under `## Unreleased`.
 
 ### English
 
+- Keep the v0.2.18 bytes for request-log provider migration 006, and accept the v0.2.19 tab-indented checksum so existing databases can boot
+
 ### 中文
 
+- 006 请求日志供应商迁移保持 v0.2.18 原文，并接受 v0.2.19 误改缩进后的 checksum，已有数据库可以启动
+
 ## 0.2.19 - 2026-08-29
 
 ### English
diff --git a/internal/accounts/backup_test.go b/internal/accounts/backup_test.go
index 8c7e0c84..ddc69dea 100644
--- a/internal/accounts/backup_test.go
+++ b/internal/accounts/backup_test.go
@@ -116,3 +116,55 @@ func TestStoreRejectsChangedAppliedMigration(t *testing.T) {
 		t.Fatal("expected migration checksum mismatch")
 	}
 }
+
+const (
+	requestLogProviderMigration = "006_request_log_provider.sql"
+	requestLogProviderChecksum  = "2deb3ef3aa94df34a8ffd0ac50a69b6cb710e7bf2e9041fc1c1f0bdfd7cb0d67"
+	requestLogProviderV0219     = "9b96b8d63286519b20791d2a3688c0b71efba6204015250ae9864c5cbcd1f0b4"
+)
+
+func TestRequestLogProviderMigrationKeepsV0218Bytes(t *testing.T) {
+	var migration sqliteMigration
+	for _, item := range sqliteMigrations {
+		if item.filename == requestLogProviderMigration {
+			migration = item
+			break
+		}
+	}
+	if migration.filename == "" {
+		t.Fatal("missing 006_request_log_provider.sql")
+	}
+	got := migrationChecksum(migration.sql)
+	if got != requestLogProviderChecksum {
+		t.Fatalf("006 checksum = %s, want v0.2.18 %s", got, requestLogProviderChecksum)
+	}
+	if !checksumAccepted(migration, requestLogProviderV0219) {
+		t.Fatal("expected v0.2.19 tab-indented checksum to remain accepted")
+	}
+}
+
+func TestStoreOpensDatabaseWithV0219RequestLogProviderChecksum(t *testing.T) {
+	dbPath := filepath.Join(t.TempDir(), "qoder.db")
+	store, err := OpenStore(dbPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var recorded string
+	if err := store.db.QueryRow("SELECT checksum FROM schema_migrations WHERE filename = ?", requestLogProviderMigration).Scan(&recorded); err != nil {
+		t.Fatal(err)
+	}
+	if recorded != requestLogProviderChecksum {
+		t.Fatalf("fresh 006 checksum = %s, want %s", recorded, requestLogProviderChecksum)
+	}
+	if _, err := store.db.Exec("UPDATE schema_migrations SET checksum = ? WHERE filename = ?", requestLogProviderV0219, requestLogProviderMigration); err != nil {
+		t.Fatal(err)
+	}
+	if err := store.Close(); err != nil {
+		t.Fatal(err)
+	}
+	reopened, err := OpenStore(dbPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	reopened.Close()
+}
diff --git a/internal/accounts/migrations.go b/internal/accounts/migrations.go
index 6104378c..db3c1099 100644
--- a/internal/accounts/migrations.go
+++ b/internal/accounts/migrations.go
@@ -10,8 +10,9 @@ import (
 )
 
 type sqliteMigration struct {
-	filename string
-	sql      string
+	filename        string
+	sql             string
+	legacyChecksums []string
 }
 
 var sqliteMigrations = []sqliteMigration{
@@ -123,8 +124,10 @@ CREATE INDEX IF NOT EXISTS request_attempts_request_id ON request_attempts(reque
 	{filename: "005_account_drop_system_prompt.sql", sql: `
 ALTER TABLE accounts ADD COLUMN drop_system_prompt INTEGER NOT NULL DEFAULT 1;`},
 	{filename: "006_request_log_provider.sql", sql: `
-	ALTER TABLE request_logs ADD COLUMN provider TEXT NOT NULL DEFAULT '';
-	CREATE INDEX IF NOT EXISTS request_logs_provider ON request_logs(provider);`},
+ALTER TABLE request_logs ADD COLUMN provider TEXT NOT NULL DEFAULT '';
+CREATE INDEX IF NOT EXISTS request_logs_provider ON request_logs(provider);`,
+		// v0.2.19 retabbed this SQL; keep that checksum bootable.
+		legacyChecksums: []string{"9b96b8d63286519b20791d2a3688c0b71efba6204015250ae9864c5cbcd1f0b4"}},
 	{filename: "007_provider_model_settings.sql", sql: `
 	CREATE TABLE IF NOT EXISTS provider_model_settings (
 	  provider TEXT NOT NULL,
@@ -166,7 +169,7 @@ func (s *Store) applyMigration(ctx context.Context, migration sqliteMigration) e
 	err = tx.QueryRowContext(ctx, "SELECT checksum FROM schema_migrations WHERE filename = ?", migration.filename).Scan(&appliedChecksum)
 	switch {
 	case err == nil:
-		if appliedChecksum != checksum {
+		if !checksumAccepted(migration, appliedChecksum) {
 			return fmt.Errorf("migration %s checksum mismatch", migration.filename)
 		}
 		return tx.Commit()
@@ -186,6 +189,18 @@ func (s *Store) applyMigration(ctx context.Context, migration sqliteMigration) e
 	return nil
 }
 
+func checksumAccepted(migration sqliteMigration, appliedChecksum string) bool {
+	if appliedChecksum == migrationChecksum(migration.sql) {
+		return true
+	}
+	for _, legacy := range migration.legacyChecksums {
+		if appliedChecksum != "" && appliedChecksum == legacy {
+			return true
+		}
+	}
+	return false
+}
+
 func migrationChecksum(sqlText string) string {
 	sum := sha256.Sum256([]byte(sqlText))
 	return hex.EncodeToString(sum[:])