Is there a single word for copy paste errors? Just like "typo"
Well there is a slang expression I recently encountered for an instance of copying and pasting:
For which Wiktionary gives both that and a second meaning:
copypasta (countable and uncountable, plural copypastas)
(Internet, slang) A block of text which has been copied and pasted from somewhere else.
(Internet, slang) An error in a software application caused by the copy-and-paste of erroneous code.
If you wait long enough (or care to start a trend), the meanings will probably fuse to give you what you want.
Remember, you read it here first.