Me too.
Oh, and I have suggestion @Genar-Hofoen:
Is every field in database obligatory to be filled? I guess no.
So, when you import data from old version, just fill what you have - system name, stars (if any specified), their classes, planets, their types - whatever user happen to specify. Let distance from Sol, masses, elements, landability, etc be empty. We need just fact of visiting and estimated system value I guess

Or just add record markup like "obtained from old db".
When some day user happens to visit same system, I suggest it will be added to log file and able to read by CL.
Unfortunately cannot check fully by my own - Added record into galaxy table, systembody, systemstar with empty or 0 values, added record to jump table - it shows entry of jump, and systemnote from galaxy, but does not show star and planet.