Process manager - SoPlan error (URGENT PLEASE)

Hi, Process manager crashes with the following error "Another process has already added the soplan item." I found a Microsoft article with a Hotfix for this issue, being that SoPlan.planref value reaches 99999. I can confirm this. I am hesitant to install this hot fix. Is anyone familiar with it? If I delete all the records in SoPlan table, it starts working again. Is this safe to do? Any help is appreciated.

Note: Running Integrity Check to Rebuild Inventory Plan does not work.

Microsoft link: https://support.microsoft.com/en-ca/help/2711380/error-message-after-the-soplan.planref-value-reaches-99999-for-a-plan-type-system-message-6909-another-process-has-added-the-soplan-record

Thanks in advance