Either your code is running on a server that doesn't have the same version, or somewhere in the code you're sourcing the original tagsets excelxp definition code and re-running it overwriting the current version.
I'd guess the last option.
Look for something like this in the code:
%include "c:\myfiles\excltags.tpl";
Replace that file with the most recent one or delete it entirely and assume you'll manually update the code.
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