Group connection info lost

@AndrewGarrison ah, it was so long I thought it was a hash.
It was harmful, but not for "ingame" features. I was trying to turn a tank into an strut and the craft broke

It's not a hash, it's just an ID for a symmetry group so the game knows which parts are symmetrical. It's harmless if it's still in the XML.

@AndrewGarrison editing the xml I've found some parts that had simmetry but once it was removed a hash remained in the code.
Even weirder, the hash was different in each line of the part

@AndrewGarrison I've found a solution, instead of branching simmetries (before I made the ring with radial x2 simmetry and then attached averything to the tank and made 2x simmetry of everuthing) I break all the simmetries that I had. This makes it more time consuming but this way it doesn't break.

Maybe if you add multidimensional simmetry in the xml in order to maintain a hierarchy whenever a part with simmetry is attached to the side of a tank the problem would be solved. I'm not sure.

Btw, why part simmetry hash is replicated in each line of the xml?

This is because once the part is connected to the craft, it no longer knows which parts to include in the rotation. This isn't a bug, but it is somewhat undesirable behavior. We do have a suggestion to improve this here.