undo conditional formatting while copying a table to another sheet

Do you want to copy just plain data (values) or formulas too? How about non-conditional formatting?

Basically - instead of
copy - paste
sentence you would need
copy - pastespecial

you may need to do it more than once for instance first copying valuesandformats then comments etc. See list of available options:
https://docs.microsoft.com/en-us/off...el.xlpastetype

BTW. Answer could be more detailed if you'd present at least a part of your code or may be used a hint from a yellow banner near the top of this page