Project directory limit?

I’ve been filing up a project directory with 8-step samples from my DFAM. When I tried to save the 100th sample I got the message:

“Errors occurred while saving the sample! ‘File already exists’”

Renaming the sample does no good, it can’t save past 99 samples. Deleting sample 99 allows me to save.

In total there are 224 files in the project folder, so not sure where the limit is.

Almost 10GB free on the card, so not a capacity issue.