Rule 21. Procedure upon misjoinder and nonjoinder.

Neither misjoinder of parties nor misjoinder of parties and claims is ground for dismissal of an action; but on such terms as are just parties may be dropped or added by order of the court on motion of any party or on its own initiative at any stage of the action. Any  claim against a party may be severed and proceeded with separately. (1967, c. 954, s. 1.)