It sounds like you have another fix that has the same name as one of the names I randomly chose. Please check the documentation for further details.
Also, please make sure you understand those few lines that I have written (including asking questions about what you don’t understand). One of the standard recommendations for posting here is that you should always start with a simple system and work your way up to something more complex. So just verify first that what I wrote even works for an x-force before trying to do y, z, etc.