XQE-WRN-0018 The dimensionInfo in V5 query has been deprecated.

[Sunchaser]

Hi all,

I have a report that was created a long time ago in Cognos 8, then migrated in 10 and now in C11.
In this report, there was a query with "Override dimension info" = Yes. If I remember correctly, this was necessary in the past due to the fact that the query is based on native SQL and used for a graph.
Now, when validating the report in Cognos Analytics, I get the warning "XQE-WRN-0018 The dimensionInfo in V5 query has been deprecated. The query will be planned regardless of dimensionInfo.", even if the report is running fine.
What should I do there? What is the impact of this warning? Performance?
Thanks
Vinc