7c009762 and 7d009762 are the same script (the first two characters just indicate the position of the mod in your load order. For some reason it moved up one position.) 009762 is the script that handles weapon enchantment scaling.
Fortunately the += operator is only used once so it's easy to ID what command is causing the problem. I'll have to take a look at the scripting of the Combat Archery mod though before I'll know how to fix the issue!
I wasn't able to find "Duke Patrick's Combat Archery" in a search on TESNexus or PES though. Is it a part of another one of his mods?
I also run See You Sleep, and I haven't seen any compatibility problems with that mod by itself yet fortunately.
One question of clarification: Do the error messages continue to spam, or are only those four reported?
Thanks, BFG