WEBDA Link and SEDS Link fields were created with the scripts and I had also an E(B-V) field created and displayed as a column in the Objects tab.
When I then changed the order by editing the User Fields, the content of the SEDS Link was displayed in the E(B-V) column.

The problem is corrected by rerunning the SEDS script or by saving the plan, closing and reloading it.

Fixed.