web/src/components/Stages/AddStagesModal.jsx

@@ -191,6 +191,7 @@ export const AddStagesModal = ({
 								onChange={handleSheetChange}
 								displayEmpty
 								size='small'
+								disabled={stage !== null}
 								MenuProps={stageSelectMenuProps}>
 								<MenuItem value='' disabled>
 									Выберите лист
@@ -214,6 +215,7 @@ export const AddStagesModal = ({
 									onChange={(e) => setSelectedDirection(e.target.value)}
 									displayEmpty
 									size='small'
+									disabled={stage !== null}
 									MenuProps={stageSelectMenuProps}
 								>
 									<MenuItem value='' disabled>