This error occurs when the search scheduler wants to restart according to the timing set in the section for the default timestamp. Indexing is indexed in files.
My problem with this solution was solved
From the Admin> Schedules> Search: Site Crawler section, edit the "Time lapse:" section to 12 hours. And set the "Retry Repeat:" section to 6 hours. This causes the rescheduling to not interfere with the previous timing and you will not receive the corresponding error. And the problem of indexing searches regularly.