Question: Why am I seeing multiple profiles with the same unique identifier if I have merge rules in place?
Answer: There are three common explanations for why multiple profiles might exist for a single individual despite a merge rule being in effect.
1. Profile merging is not retroactive
When you add a profile merge rule related to a unique identifier profile property, the merge rule is only applied from that moment forward. For details, see the Overview: Profile merging in BlueConic and Profile merging scenarios articles.
If you would like a merge rule to be applied to already created profiles, contact BlueConic Support to run a special maintenance connection.
2. IP checking
If you have selected the 'Regular IP Check’ or ‘Strict IP Check’ rule, profiles may not be merged due to IP address checks.
3. Limit of 1000 merges per profile
For all profile merges, BlueConic imposes a limit of 1000 merges for a single profile. When the merge limit is exceeded, profiles can no longer be merged. See Merging profiles on multiple unique identifiers for details. As a result, duplicate profiles could be created with the same unique identifier value. To reset the merge count, please submit a Support ticket.