While most creditors update on a regular monthly schedule, updating is not required unless previously reported information has changed such that it is no longer accurate.
FCRA 623(a)(2).
If you have substantive information that is no longer accurate, then the creditor is required to "promptly" update.
The FCRA does not state that it must be monthly, but a reasonable interpretation of promplty would be in their next regular reporting cycle.
It is not something I would routinely dispute unless it is important information, or months past any last update, as the FCRA does not fix a specific update period.
I would begin with an informal request to the creditor to update.
