Not detecting changes in schema (postgres)

Pic 1: On first drizzle-kit generate, it generated the sql as expected Pic 2: On 2nd drizzle-kit generate, I added .default() to the updatedAt, but it says "No schema changes, nothing to migrate" Is this the expected behaviour? Is it currently not able to detect the function level changes? If so, what's the recommended thing to do? delete the sql and regenerate or what?