LogBook: Dataset not in edit or insert mode

[hb9dhg]

Hello Jordi,

i do like to report a strange issue i faced today.
I have worked ZD7FT and i was able to log this call.
After saving it, i wanted to edit the IOTA reference to AF-022.

I have attached the error i get.
The strange thing is that i get the same error ONLY on this callsign.
Whenever i try to save / edit the QSO, i see this message.

It also happens if i try to change past QSOs (e.g. removing the IOTA reference or anything else)
and also on different friends' databases. 
Do you have any tip i have to follow to identify where the source of the issue is?
Thanks a lot.

Fulvio HB9DHG