The Problem was the not-type-safe null-check in the PropelDateTime util class.
Passing an Integer 0 (that e.g. comes from the SplFileInfo::getMtime()) to the setter of the field, results in the 0 being interpreted as null, thus the update/insert query is failing.
The Problem was the not-type-safe null-check in the PropelDateTime util class. Passing an Integer 0 (that e.g. comes from the SplFileInfo::getMtime()) to the setter of the field, results in the 0 being interpreted as null, thus the update/insert query is failing.
FIxes #2010