When my update fails, the error will be displayed immediately in the wrong place, and there is no way to go to the next line of judgment.

Question

Line 40 is a direct error, resulting in line 43 not being judged

Answer 1

Your table account has uniqueness set. . . Moreover, the error statement is inserted instead of modified

Answer 2

Huh? But the video later says that $rr can be directly determined. What’s the reason?