fix: avoid removing healed parts on dstDataPath (#12795)

destination path and old path will be similar
when healing occurs, this can lead to healed
parts being again purged leading to always an
inconsistent state on an object which might
further cause reduction in quorum eventually.

cmd/xl-storage.go

@@ -2054,6 +2054,12 @@ func (s *xlStorage) RenameData(ctx context.Context, srcVolume, srcPath string, f
 				// Purge the destination path as we are not preserving anything
 				// versioned object was not requested.
 				oldDstDataPath = pathJoin(dstVolumeDir, dstPath, ofi.DataDir)
+				// if old destination path is same as new destination path
+				// there is nothing to purge, this is true in case of healing
+				// avoid setting oldDstDataPath at that point.
+				if oldDstDataPath == dstDataPath {
+					oldDstDataPath = ""
+				}
 				xlMeta.data.remove(nullVersionID, ofi.DataDir)
 			}
 		}