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Process Builder error, cannot re-activate a process

Need to rollback a process to a previous version.  After deactivating the most recent version, receiving this error when attempting to re-activate the original version.

"Unfortunately, there was a problem. Please try again. If the problem continues, contact Salesforce Customer Support with the error ID shown here and any other related details. Error ID: 158541872-10573 (1952119784)"

activation error

Submitted a case to Support, but find the community often does a better job answering these questions.
SonamSonam (Salesforce Developers) 
Try the resolution mentioned in the help doc on the link below:
Yup, we hit our limit. Having Customer Support increase it fixed the problem. Thanks!