How to insert the same Unique ID into two or more rows related columns?

[Jiri_Janda]

I need to insert the same unique ID into the appropriate field in two different rows. I tried to solve the situation using Behaviour->Actions-> Data: set the values of some columns and this row, but it generates a different UID for each row related field. That’s why I used the command in Expression Assistant: CONCATENATE (“AEROTOW”, TEXT (DATETIME (UTCNOW ()), HHMMSS)), but sometimes it generates a different value by a second.
Does anyone knows easy way how to solve this?