Database tagging improvement. Solved bug : if two tagging operations are done in the same datetime, the last one overrides the first and a tagging version is lost
Revert "Database tagging improvement. Solved bug : if two tagging operations are done in the same datetime, the last one overrides the first and a tagging version is lost"

This reverts commit 61e99faf1a3147f70f47b2014884f4e4fa92d49e.