Seeing several examples of merged rule duplicates

[15718] dbg: rules: __XM_OL_015D5 merged duplicates: __XM_OL_4BF4C
__XM_OL_4EEDB __XM_OL_5B79A __XM_OL_9B90B __XM_OL_ADFF7 __XM_OL_B30D1
__XM_OL_B4B40 __XM_OL_BC7E6 __XM_OL_F3B05 __XM_OL_FF5C8

[15718] dbg: rules: __XM_OL_07794 merged duplicates: __XM_OL_25340
__XM_OL_3857F __XM_OL_4F240 __XM_OL_58CB5 __XM_OL_6554A __XM_OL_812FF
__XM_OL_C65FA __XM_OL_CF0C0 __XM_OL_F475E __XM_OL_F6D01

Can't figure out if they're a problem and/or what the disadvantages (if
any) could be.


or better, would someone be so kind and explain what's happening in the
background?

thanks