What to do if the table is broken?

Question

MySQL

Good afternoon. When I try to make a backup using Bitrix, I get the error "Table c_123___section is destroyed as a result of an internal MySQL error. Restore it entirely from a backup copy or only the structure through a system check. Okay, I try to dump the database through mysqldump, I get the same" Table 'c_123___section' doesn't exist when using LOCK TABLES. The site works without problems. And what to do next to get a copy of the site?