Relations with same source overwrite previous one

I run the polar workflow with several loop, I define a relation /Prisms/Convert/NGON in loop with a prisms mesh coming from before loop so the relation is redefine in each loop. But I notice that the relation is overwriten:

d600560@rosetta-bigviz04:[/data/collab/MOSAIC/Work/Laure/run_mosaic]$mz_db -Q ::Relation /Prisms/Convert/NGON % %
### ====================================================================
### MOSAIC (v1.1) - 2024-04-30T16:31:31
### 
### Relation Name                                                      Paramters
/Prisms/Convert/NGON                                         306E41D44E754C6CA98CD9E920FDF4F6 FE7188D64FA8403390C18D070019CA40
/Prisms/Convert/NGON                                         90AC9D255EBC4281951B03460022C915 DB96EB7197584A55AABE7AFD672FDE40
/Prisms/Convert/NGON                                         6CAF8D8F69FB4768AF48E3D6EF21824E EAD6623DA35C474999C51DD93D30A5D2
/Prisms/Convert/NGON                                         A8AC4E63C79644779975422147B12C33 6C00450AFBBF4A55A1F0DD8BEDEB1FB1
/Prisms/Convert/NGON                                         5597440056E14199A597E462F230C2A2 A675F0309291402A8C0E2FF65E83A382
/Prisms/Convert/NGON                                         68BE181809CF4D098633F91D0AC2F777 49FF3699F13940C2A21C3FB9CE106F38
/Prisms/Convert/NGON                                         69A61FCC6911400A9E22EA938150FAD4 2D96F600B44948589ABDAD250CA71B2E
/Prisms/Convert/NGON                                         4C71233FD7704EB6A63EAC5D697D8B06 4B965685A5334E55887DD59F28858B48
/Prisms/Convert/NGON                                         F03FC6943DC64A19880AEC2A37D2DB48 2C756A57D3634C41836A568FE5EF224C
/Prisms/Convert/NGON                                         539527C145094D5EB08788F11A74DEBB 855DC1D4A13444E38983A2DA57F6EDE5
/Prisms/Convert/NGON                                         268EA1A8807644D58CD3EA13DB3786F1 B5B587DCBEDC4F35BAA7C2BF76B3A811
/Prisms/Convert/NGON                                         8127C71CDFCC47CE8876E25FFBD8EE88 DDBB388438AB4C82867082815601E5E2

puis après quelques cycles:

d600560@rosetta-bigviz04:[/data/collab/MOSAIC/Work/Laure/run_mosaic]$mz_db -Q ::Relation /Prisms/Convert/NGON % %
### ====================================================================
### MOSAIC (v1.1) - 2024-05-02T09:38:34
### 
### Relation Name                                                      Paramters
/Prisms/Convert/NGON                                         306E41D44E754C6CA98CD9E920FDF4F6 FE7188D64FA8403390C18D070019CA40
/Prisms/Convert/NGON                                         90AC9D255EBC4281951B03460022C915 DB96EB7197584A55AABE7AFD672FDE40
/Prisms/Convert/NGON                                         6CAF8D8F69FB4768AF48E3D6EF21824E EAD6623DA35C474999C51DD93D30A5D2
/Prisms/Convert/NGON                                         A8AC4E63C79644779975422147B12C33 6C00450AFBBF4A55A1F0DD8BEDEB1FB1
/Prisms/Convert/NGON                                         5597440056E14199A597E462F230C2A2 A675F0309291402A8C0E2FF65E83A382
/Prisms/Convert/NGON                                         68BE181809CF4D098633F91D0AC2F777 49FF3699F13940C2A21C3FB9CE106F38
/Prisms/Convert/NGON                                         69A61FCC6911400A9E22EA938150FAD4 2D96F600B44948589ABDAD250CA71B2E
/Prisms/Convert/NGON                                         4C71233FD7704EB6A63EAC5D697D8B06 4B965685A5334E55887DD59F28858B48
/Prisms/Convert/NGON                                         F03FC6943DC64A19880AEC2A37D2DB48 2C756A57D3634C41836A568FE5EF224C
/Prisms/Convert/NGON                                         539527C145094D5EB08788F11A74DEBB 855DC1D4A13444E38983A2DA57F6EDE5
/Prisms/Convert/NGON                                         268EA1A8807644D58CD3EA13DB3786F1 B5B587DCBEDC4F35BAA7C2BF76B3A811
/Prisms/Convert/NGON                                         8127C71CDFCC47CE8876E25FFBD8EE88 AAACF3A8593E4A999226D80246E0C6A5

@d589055 ask me about relation cardinality, it looks like the first time I added my profile to the db I had the cardinality 1, even if I changed it after, it should not have been updated.