Fix YEAR in format 2022\\2022 to 2022

Often the YEAR field is in the format 2022\\2022 and not just the numeric 2022.
Is there filter that I can use to find those with the \\ in them?

The following filters do not work:
year HAS "\\", %year% HAS "\\", %year% HAS \\

Thanks

see e.g. here:

Use an action of the type "Remove duplicate fields" for YEAR

JJ_Johnson posted the answer in 2012.
This fix is

Thanks all!

Or
"$meta(year,1)" PRESENT

Yet, the filter does not fix it.
The fix would be to apply the actions either to merge the duplicate fields or to remove the duplicates.

That did it! Thanks for the response