wpsnoop: Only one plugin saves "_transient_wphelpkit-flush-rewrite-rules" in wp-options: HelpKit - Documentation and Knowledge Base WordPress Plugin
Programmers, site owners, WordPress users come here to discover which plugins and/or themes create an entry in the wp-options table where option_name is set to _transient_wphelpkit-flush-rewrite-rules
wpsnoop continually tests and analyzes over 100,000 WordPress Themes and Plugins to find conflicting options that share the same name and we have found...
There are 1 plugins/themes that store an option named "_transient_wphelpkit-flush-rewrite-rules" in the wp-options table.
Total Uses refers to the number of different plugins and themes that create a wordpress option with the name _transient_wphelpkit-flush-rewrite-rules while "Orphaned Options" or "Zombie Options" refers to the number of options that are still left behind after a plugin or theme has been uninstalled.