While upgrading from v12 to v13 getting following error.
pymysql.err.InternalError: (1118, 'Row size too large. The maximum row size for the used table type, not counting BLOBs, is 65535. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs')
Have updated database and converted ‘Data’ to ‘Text’ field.
update `tabCustom Field` set fieldtype = 'Text' where name like 'Sales Invoice-%' and fieldtype = 'Data';