TSW Nomination Key Inconsistently Generated

Hi Experts,

I am a TSW newbie.

I noticed that in our system, the nomination key are inconsistently generated for new nominations.

For example, say 30 nominations were created previous day.

For the following day, the nomination key generated by system for new nomination is 60.

By right, the nomination key should be created by sequence, which should be 31.

Sometimes, this occurence happens within the same day.

Would this be due to configuration or perhaps issue with DB?

Please assist.

Would appreciate your help.

Regards,

HJMY