weizhouapache commented on issue #7358:
URL: https://github.com/apache/cloudstack/issues/7358#issuecomment-1611599449

   > If the database has no backup, how to fix this issue ?
   
   @xuanyuanaosheng 
   you need to rollback your database to 4.17.2.0, upgrade mysql and then try 
to upgrade to 4.18.0.0 again
   
   try again after dropping the following columns
   ```
   ALTER TABLE `cloud`.`networks` DROP COLUMN `public_mtu`;
   ALTER TABLE `cloud`.`networks` DROP COLUMN `private_mtu` ;
   ALTER TABLE `cloud`.`vpc` DROP COLUMN `public_mtu` ;
   ALTER TABLE `cloud`.`nics` DROP COLUMN `mtu`;
   ```
   


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