iPhone Duplicating Cellular Service

[JackTwist]

When I upgraded from the iPhone XS to the iPhone 11 Pro, I forgot to switch out the SIM card from the original phone. I realized this during the Restore process and after putting on my seemingly difficult to remove case. I called T-Mobile to have the SIM card swapped. Upon doing so, I noticed that there was now two separate cellular plans for the same phone number and same carrier. The first is the deactivated Restored line and the second the new update via T-Mobile support. Although I can deactivate and reclassify the original as the secondary line, there is no way to remove it. After deactivating, it no longer shows the "P" every time a call comes in but I have found no way to remove this duplicate phone line. I'm not sure if it will cause any issues but was curious if anyone had the same thing appear and/or find a way to resolve.