Weird logs accessing study dicom tags (Accessing Dicom tags from storage when accessing study)

I have as output log of my Orthanc server the follow:

W0131 14:53:09.576734 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0020,000e;0020,0011;0020,0013
W0131 14:53:09.597958 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0020,000e;0020,0011;0020,0013
W0131 14:53:09.625258 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0020,000e;0020,0011;0020,0013
W0131 14:53:09.651928 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0020,000e;0020,0011;0020,0013
W0131 14:53:13.292955 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0008,0005;0008,1050;0032,4000;4008,0212
W0131 14:53:18.292645 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0008,0005;0008,1050;0032,4000;4008,0212
W0131 14:53:24.694466 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0008,0005;0008,1050;0032,4000;4008,0212
W0131 14:53:28.535694 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0008,0005;0008,1050;0032,4000;4008,0212
W0131 14:53:33.529876 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0008,0005;0008,1050;0032,4000;4008,0212
W0131 14:53:36.264820 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0020,000e;0020,0011;0020,0013
W0131 14:53:38.517625 ServerContext.cpp:2520] W001: Accessing Dicom tags from storage when accessing study : 0008,0005;0008,1050;0032,4000;4008,0212

I tried to search something in different sources but don’t exists references about this. Some light of theses log messages?

This is documented here. The warnings can be disabled in the configuration file.

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Thanks !!!