After I calculated several areas in the attribute table (added a column, named it "Areas" and then calculated with "$area" in the calculator), I could not save the new information within my given layer.
Instead I keep getting the below message "Could not commit changes to layer landuse "Errors: ERROR: 1 new attribute(s) not added ERROR: 55 attribute value change(s) not applied. Provider errors: SQLite error: duplicate column name: AREA SQL: ALTER TABLE "landuse" ADD COLUMN "AREA" FLOAT SQLite error: near "WHERE": syntax error SQL:"
How to deal with that?
I am very new to QGIS and have no coding background.