plant issue during cross company sales orders creation

Hi experts,

When creating sales orders, the system pops up "Maintain plant XX for the sales area Message no. V1762". I have gone through nearly all the relevant thread in the forum but failed to solve it.

Moreover, the plant is just assigned to one of two company codes (the company who delivers goods). In OVX6, the plant has been assigned to two sales organizations properly as well as distribution channels. Those two sales organizations belong to two company codes separately.

Should I delete the plant assignment, and re-assign it to the company who receives customers' orders? Pls help to solve. Thx.