basic FC reading is working for different script version

src/gui_qt/data/datawidget/datawidget.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from nmreval.lib.logger import logger
 from nmreval.lib.colors import available_cycles
 
 from .properties import PropWidget
@@ -356,7 +357,10 @@ class DataTree(QtWidgets.QTreeWidget):
                 except AttributeError:
                     idx = self.invisibleRootItem().indexOfChild(item)
                     self.invisibleRootItem().takeChild(idx)
-                    self._checked_graphs.remove(_id)
+                    try:
+                        self._checked_graphs.remove(_id)
+                    except KeyError:
+                        logger.warn(f'Graph {_id} already removed, skip')
 
             iterator += 1