Compatible with spd with empty scope

[luomingmeng]

What type of PR is this?

Bug fixes

What this PR does / why we need it:

Which issue(s) this PR fixes:

Special notes for your reviewer:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.56%. Comparing base (4858a44) to head (d8cf8dc).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #637      +/-   ##
==========================================
- Coverage   56.75%   56.56%   -0.19%     
==========================================
  Files         545      545              
  Lines       51537    51564      +27     
==========================================
- Hits        29248    29166      -82     
- Misses      18583    18709     +126     
+ Partials     3706     3689      -17     

Flag	Coverage Δ
unittest	56.56% <100.00%> (-0.19%)	⬇️

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