Annotation:

This is a "set expression" with the word "ain't" that you will hear even highly-educated people use even in formal situations.

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I'd suggest deleting this one.

It should be like this.

[#1040798] If it ain't broke, don't fix it. (CK) *audio*

We also have this version.

[#2170155] Don't fix it if it ain't broke. (CK) *audio*



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@CK
Thank you!
I just misplaced "it" in the sentence
which exists in this form you already used, as
"If it ain't broke, don't fix it." [https://www.merriam-webster.com...7t%20fix%20it]
Of course, I recognize that I miswrite that idiom! I corrected it.
You can delete it or let it linked with yours.



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# This comment was copied from #10125449 when duplicate sentences were merged.
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Duplicates of this sentence have been deleted:
x #10125449

Duplicates of this sentence have been deleted:
x #12784581