AAR/ARS Corrupted table aar show question mark in call type

[rreganassi]

We had a problem, where outgoing calls not completed.
When performing trace the call, found an error denial event 1751.
When checking the tables AAR / ARS most of the numbering plan had were gone, some who were still there appeared a question mark "?" the call type field.
It was not possible to delete or change any field in that table giving the message Error encountered, can not complete request.
As a way to restore the system performed a restore , where afte this procedure, the system returned to normal.
We would like to know the possible cause of this problem and what action to take

[gupta1]

Denial Events 1751 indicates to No Route Pattern or preference translated.
If there is anything related to corruption or required value cannt be seen, please engage Avaya, so that engineer can look into the issue, and see possible cause. On the basis of findings permanent solution can be given.
If issue is still there please open a SR with Avaya.

[rreganassi]

opened a case in avaya, but it was not possible to collect data.

Thanks.