You didnt break anything and neither did i
Just go to the sector with the port (that one that appears in the under contruction form) and it will disappear.
Most likely, it was started and you picked it up on CIM. the someone placed a fig there so you dont get the port updates on CIM. It is called a "blocked port."
That is the case with the other ports under construction as well. If you start a new port and then place a defensive fig in the sector, the port will appear in the log BUT it will not appear on anyones CIM except for the the person and teamates of the person who placed the fig.
I hope that clears things up.
earth.