diff --git a/internal/storage/sqlite/migrations/028_tombstone_closed_at.go b/internal/storage/sqlite/migrations/028_tombstone_closed_at.go
index 2991bb8b..7b2eff4e 100644
--- a/internal/storage/sqlite/migrations/028_tombstone_closed_at.go
+++ b/internal/storage/sqlite/migrations/028_tombstone_closed_at.go
@@ -48,6 +48,7 @@ func MigrateTombstoneClosedAt(db *sql.DB) error {
 			assignee TEXT,
 			estimated_minutes INTEGER,
 			created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+			created_by TEXT DEFAULT '',
 			updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
 			closed_at DATETIME,
 			external_ref TEXT,