Some labels are duplicate

Thanks for your great work on VCSL dataset! When checking test pair in `split_meta_pairs.json`, we found about 1% of the labels are self-duplicate (e.g. `e45b9eec5ea54e00a2d6e6689cd5fe92-e45b9eec5ea54e00a2d6e6689cd5fe92`, `dd44c4be9fdc4c95bdf075e7e756294e-dd44c4be9fdc4c95bdf075e7e756294e`) or query-reference reverse duplicate (e.g. `dd44c4be9fdc4c95bdf075e7e756294e-0a25c04af29940e5b34676b6c1a7eca1`(label:`[[65, 1, 79, 156]]`) and `0a25c04af29940e5b34676b6c1a7eca1-dd44c4be9fdc4c95bdf075e7e756294e`(label:`[[1, 65, 156, 79]]`)). And labels of some query-reference reverse duplicate pairs are different (e.g. `dd44c4be9fdc4c95bdf075e7e756294e-ca334995c55c45af93dee776799f0433`(label:`[[52, 9, 82, 44], [68, 84, 82, 96], [9, 1, 16, 7], [46, 97, 49, 100], [47, 45, 49, 47]]`) and `ca334995c55c45af93dee776799f0433-dd44c4be9fdc4c95bdf075e7e756294e` (label:`[[9, 52, 44, 82], [1, 9, 7, 16], [97, 46, 100, 49]]`)). These duplicate pairs may cause inaccurate results. I would like to ask that are these duplicate pairs made by mistake or by designed, thank you!