Condition of a used woWa

Hello, since I don’t know about caravans, I hope you can help me. Today we looked at a caravan that dates back to 2003, from the company Dethleffs 560 SK. This caravan corresponds to our ideas. The caravan is in a very good condition. Here my question: When I looked at the WoWa, I noticed at the front, on the right, that the side wall about 0.5 to 1 cm from its origin, opposite the left side The owner gave me the answer that this is just like that. In the previous where where would you have had that too. Is this normal ???? Since I have no idea, I would be happy if one of you could write me something about it. mfg Armin