fix: fix explain unexist rule

[Yisaer]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 28.57143% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 64.08%. Comparing base (0ca7c72) to head (a0704db).
Report is 2 commits behind head on master.

Files	Patch %	Lines
internal/server/rest.go	28.57%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2685      +/-   ##
==========================================
+ Coverage   64.05%   64.08%   +0.03%     
==========================================
  Files         329      329              
  Lines       38468    38475       +7     
==========================================
+ Hits        24638    24655      +17     
+ Misses      11661    11655       -6     
+ Partials     2169     2165       -4     

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