Write each sentence in indirect speech.
Direct = Nick said, “Please don’t ask how the meeting went.”
Indirect = Nick said not to ask how the meeting had gone.
Source: Summit 2B (by Joan Saslo and Allen Ascher) Pearson
Longman Press, Unit 8, Direct and Indirect Speeches.
Can we change the blue one into "Went" or it will be incorrect?
I don't fine using "went" that strange if the utterance was just a few moments ago. As I said in a different post, I don't think it's quite as "required" to back shift from past to past perfect as it is from present to simple past.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.