My pin oak(~28"dbh) I trimmed a couple weeks ago has an eastern red cedar growing a couple feet away from it. It's 8'-10' tall now. I had tried to dig it up a bunch of years ago, ran into problems, and just let it go. I kind of like it there, but I don't want it to injure the pin oak. Seems like something has to give at some point, and if it's the ERC, that isn't a problem, but I don't want it to harm the oak. Do I have any potential issues here?