I have some simple code like this:

var existingIaid = scriptContext.newRecord.getValue('custbody_erp_bp_byproductadjust');

            if (bomentries.length == 0) {
                record.delete({
                    type: 'inventoryadjustment',
                    id: existingIaid
                })
                log.debug('deleted', existingIaid)
                return
            }

When it the conditions are satisfied it gives me:

Items you have requested in the record have been deleted since you retrieved the form

It deletes the ia fine and then instead of returning it gives me this error.

sounds like an error being thrown after submit on the inventory adjustment

There are no scripts running there?

workflows?