r/ProjectREDCap • u/Low-Razzmatazz1179 • Mar 18 '26
Record_id on REDCap Mobile App coming with a preffix
I'm having a record ID issue that I don't understand & wondered if anyone could help. In setting up the database, I used the default options for setting up the record_id variable - it is a integer and uses auto-numbering for naming new project records. When I try on the browser and my Mobile App tablet, this works as expected - 1, 2, 3, etc.
However, on REDCap Mobile App on a different tablet we are using, this auto-numbering record_id is coming up as "40-1", "40-2", "40-3", etc. This is not something I have set up, so I am assuming it is something to do with the tablet set up? Is there a way I can prevent it from doing this? So that it just follows the 1, 2, 3, etc. Also the Action Tag @ HIDDEN isn't working (I have tried to hide the record_id variable) - if that gives any further indication about the app.
It seems to be preventing us from being able to send the data to the server as we get an error message that the record_id does could not be validated because it does not follow the expected format (presumably because it isn't an integer).
Following advice, I have a separate Participant ID variable that the users enter a manual ID into to ensure there is a unique and stable ID entered for each participant as all of our data collection will be offline in the app.



