if i deploy new postgres, Will I lose all data from it?

No. You're deploying the postgres service itself. Volume that connected to it are still being the same.

To actually "lose the data" you will need to wipe the volume separately. Thats how volumes works.

So in your current postgres just find your deployment, click three dots and "Redeploy".

What was suggested above is correct redeploying the Postgres service itself does not automatically delete your database volume/data.

In Railway, the database data lives on the attached volume separately from the running container.

The:

“catatonit: failed to exec pid1”

error usually points more toward a broken container/runtime startup state than actual Postgres data corruption.

So the safest first recovery step is:

• redeploy the existing Postgres service
• keep the same attached volume
• avoid deleting/wiping the volume unless absolutely necessary

Only removing the volume itself would risk permanent data loss.

Given the timing, this also aligns with several container/runtime issues reported after the May platform incident.