SMF 1.1.18, while the data repository file version is 1.1.4.

[vppm]

NOTE: You may need to update the database. Your forum is file version SMF 1.1.18, while the data repository file version is 1.1.4. Rerun the latest upgrade.php may resolve the error here.

how can i do?

[kat]

When do you get this error, exactly?

[MrPhil]

There have been database upgrades between 1.1.4 and 1.1.18, so you will need to upgrade (see the 1.1.18 Large Upgrade package). However, this should be part of a larger error message, which shouldn't be ignored (as it's the primary problem).