That column (custom_data) was added by 2024_required_update.sql
I'm using an old DB that I have updated over time. Maybe that update is missing from PEQ r57 peqdb_rev2027.sql.gz if that is the DB you have installed.
EDIT: No, that column is there for a brand new install. Sounds like you missed this in the readme.txt:
Code:
4. Enter the updates folder, read the readme.txt there and be sure to source in any updates since the last time you updated.
You still need to source updates that affect 'player' tables, of which inventory is one.