Projects Module: DB_ERROR_42803

Hi, first post and new to Dolibarr.

Long story Short: I launched an EC2 instance on AWS to run Dolibarr v13, running PostgreSQL 12.4 on RDS, and Dolibarr on Ubuntu 20.04 LTS. All DIY, not Bitnami’s AMI.

Once I started setting up modules I got this:

I can’t find anyone else seeing this on the usual sites, but I can’t be the only one. How do I fix this? I’m not well versed in PHP, so I’m not sure where to find the line of code trying to access my DB.

Thanks in advance.