Fix insert object segment error when use multiple dirs

[HTHou]

Description

Fix the following error.

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.32%. Comparing base (8e99486) to head (075e3a1).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
.../iotdb/db/storageengine/dataregion/DataRegion.java	0.00%	12 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #16965      +/-   ##
============================================
- Coverage     39.32%   39.32%   -0.01%     
  Complexity      212      212              
============================================
  Files          5053     5053              
  Lines        337216   337228      +12     
  Branches      42923    42926       +3     
============================================
- Hits         132603   132600       -3     
- Misses       204613   204628      +15     

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