I was able to change that field by directly accessing the odoo database. I used pgadmin to do so. The table name is account_journal and can be found in the database in "Schema's", "Public", "Tables", "account_journal". The field name is "restrict_mode_hash_table" and it needs to be filled with [null]. In fact I changed it to [null] for all entries. This is not a setting you should use in a big company (your auditor will definitely not like it), but I have experienced that having this box unticked has many small advantages. Hope this helps.