Hello CAP Team,
due to an issue in the Backend System data migration I have to deactivate the referential integrity check globally. According to @assert.integrity Constraint for to-one Associations this can be done with:
cds.env.features.assert_integrity = false
As this option should only take effect on a specific deployment in the SAP BTP Cloud Foundry I've defined a user provided variable in the BTP Cockpit of our App:

when I ssh into the running app I can see that this value was correctly set:
vcap@b3904c23-24c4-48a0-4432-9caa:~$ env | grep CDS_ CDS_ENV_FEATURES_ASSERT_INTEGRITY=false
But when I now restart the data import I still see the ASSERT_REFERENCE_INTEGRITY errors in the log:
2021-10-27T13:59:32.86+0200 [APP/PROC/WEB/0] ERR {
2021-10-27T13:59:32.86+0200 [APP/PROC/WEB/0] ERR code: 'ASSERT_REFERENCE_INTEGRITY',
2021-10-27T13:59:32.86+0200 [APP/PROC/WEB/0] ERR message: 'Reference integrity is violated for association "customer"',
I guess the underscore in the parameter name assert_integrity might be the issue. I'm now trying also with the Variable CDS_ENV_FEATURES_ASSERTINTEGRITY. I add a comment if that was sucessful.
CU
Gregor