Help Database 4 byte UTF-8 support

Hello everyone, I have a problem that I can not solve for a few days, I made an update of drupal version 7.50 since this update, it tells me to activate Database 4 byte UTF-8 support to finish the update of the database so I followed the tutorial official drupal for the activated on the following links:

After doing all the manipulations I have a message that it is enabled but that I have to convert the database: Enabled, but database tables need conversion. I actually converted the database but it does not catch it and I check phpmyadmin and it is well converted so I do not understand why the message remains.

I thank you for your help in advance and I hope someone can help me because I despair 🙂

Drupal version: