We ran a delete command against the database and deleted an older custom patch. Once that was completed we were able to add the newly created custom patch. So it does look like there is a limit on the number of custom patches you can have.
To delete an old patch I executed the following queries:Ran 1st:
Where pspplpatchID=3808Ran 2nd:
Delete from [ShavlikScans].[dbo].[Patches]
Where patchID = 3808
Very interesting. I'll perform a bit of research and get back to you on my findings.