About unable to purchase colour change for the Gundam lightsaber

About unable to purchase colour change for the Gundam lightsaber，This issue was not clearly explained during the linkage，Therefore, it is no longer feasible for me to use the season pass green coins to unlock the remaining colours

I have unlocked the Gundam lightsaber, but I can no longer purchase colour changes, which is very frustrating.

There are probably quite a few players who haven't bought the colour change yet and are as helpless as I am.

I think players who have a lightsaber can unlock the option to change its colour for purchase in the warehouse interface.