Database broke after editing picks manually

Dear cisTEM team,

after I edited the picks manually (deliting and editing) on my micrographs I tried to create a new refinement package. Upon this the cisTEM gui crashed:

(cisTEM:13787): Gtk-CRITICAL **: IA__gtk_tree_row_reference_new_proxy: assertion 'path->depth > 0' failed

(cisTEM:13787): Gtk-CRITICAL **: IA__gtk_tree_row_reference_new_proxy: assertion 'path->depth > 0' failed
Calling DrawOrthViews
Calling DrawOrthViews
Calling DrawOrthViews
Calling DrawOrthViews
Error: mode 32604 MRC files not currently supported

When I tried to restart cisTEM it won't allow me to open the corresponding database - by clicking on the last sessions link or by selecting it in the browser (open database). The error that I get and the gui instantly crashes:

Gtk-Message: Failed to load module "pk-gtk-module"
Gtk-Message: Failed to load module "canberra-gtk-module"
Oops. Could not find array position of asset with ID 28996
Segmentation fault

many thanks for your help

cheers

Arne