Lines overlap

Hello,

I am designing a cantilever soldier pile as shown in the image. The soldier pile has an embedded length of "D" in concrete and an exposed length of "H-D". The soldier pile has a given section of W 18x32. I know Plaxis does not has a provision to input the "I" section. I plan to approach the problem with two embedded beams ( one for the soldier and one for the cement grout) as shown in the figure. I see in PLAXIS it says as lines overlap. How can I resolve it, please advise.

Thank you,

Faisal