You are facing the issue due to the different database versions. Please, follow this steps to fix the issue:
- Head to /wp-include/ folder.
- Open the version.php file.
- Find the value for $wp_db_version.
- Open your database. Find wp_options.
-
Use the following line to identify the value of db_version:
SELECT option_value FROM yourdatabase.wp_options WHERE option_name="db_version";
The values of $wp_db_version and db_version must be the same. Make sure that you make the change in the version.php file, but not the database.