ᐅ Installing an Oven in an Ikea Faktum Base Cabinet

Hello everyone,
I have the following problem: After moving, I bought a new Faktum kitchen and brought my old oven (Balay) with me. The oven has already been connected by an electrician. Now the issue is: the oven does not fit properly into the cabinet—there is a gap of about 1 cm (0.4 inches) at the front. You cannot push the oven in any further even with a lot of force. It feels like the cabinet is just 1 mm (0.04 inches) too narrow for the oven or that something is blocking it from the back (towards the wall). Am I just doing something wrong when installing the oven, does Faktum not have a standard size, or have you ever encountered a similar problem and can give me some advice?
Thanks in advance!

The rails on which the stove stands have small indentations for reinforcement that the stove can catch on. If this happens, the only solution is to push the stove in with a lot of force. When doing so, apply pressure not from the top but from the very bottom using your hands or feet.