Schleich 16402 - Brachiosaurus

I have a Brachiosaurus which seems to have a 'damaged' neck.

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It looks like a cut - but it is very smooth.

I saw another one with a similar problem - only much smaller.

So I would like to know whether it is a common problem with this figurine.
It looks so whether a ridge was removed.

Hmmm...it looks like it is the place where the plastic ran into the mould, and then they have cut off some residue...or ?
As far as I know it was first made in 1994, so the moulds may have been different back then ?

I do not have this model, - perhaps others do and can see if it is just how it looks ?