Guild Wars 2

This message pops up every ten seconds, I do not know what to do, how to get rid of. It gets on my nerves, if I did not get to clean it up I delete this game.
All my equipment is normal as it was before, I do not know the reason for this message pops up. Requests double click on it but nothing happens. Who knows how can I disable it?

You need to carefully check every weapon, piece of gear and trinket, including underwater weapons, and find the one that used to have MF on it, and assign it some stats.

One way to do this is to un-equip each and every weapon, piece of gear and trinket, and add them back one at a time, until the message pops up. Then you will see which one needs stats assigned.

Good luck.