fix: skip capacity/overlap checks when already_done=true

app.py

@@ -1789,6 +1789,14 @@ def api_new_slot():
     cooldown_s  = int(s.get('cooldown_minutes', 15)) * 60
     start_dt    = datetime.fromisoformat(start_str)
     end_dt      = start_dt + timedelta(seconds=job['print_time_s'] + cooldown_s)
+    already_done = bool(d.get('already_done', False))
+    if already_done:
+        # Retroactive — skip capacity/overlap checks, insert as done
+        conn.execute(
+            'INSERT INTO print_slots(job_id,printer_id,planned_start,planned_end,status) VALUES(?,?,?,?,?)',
+            (job_id, printer_id, start_dt.isoformat(), end_dt.isoformat(), 'done'))
+        conn.commit(); conn.close()
+        return jsonify({'ok': True})
     conflict = _check_overlap(conn, printer_id, start_dt, end_dt)
     if conflict:
         conn.close()
@@ -1799,14 +1807,6 @@ def api_new_slot():
     if over:
         conn.close()
         return jsonify({'error': f"Capacité maximale atteinte : {peak} impression(s) déjà en cours sur ce créneau (limite : {max_printers} simultanées). Décalez l'horaire ou attendez qu'une imprimante se libère."}), 409
-    already_done = bool(d.get('already_done', False))
-    if already_done:
-        # Retroactive — skip capacity/overlap checks, insert as done
-        conn.execute(
-            'INSERT INTO print_slots(job_id,printer_id,planned_start,planned_end,status) VALUES(?,?,?,?,?)',
-            (job_id, printer_id, start_dt.isoformat(), end_dt.isoformat(), 'done'))
-        conn.commit(); conn.close()
-        return jsonify({'ok': True})
     conn.execute('INSERT INTO print_slots(job_id,printer_id,planned_start,planned_end,status) VALUES(?,?,?,?,?)',
                  (job_id, printer_id, start_dt.isoformat(), end_dt.isoformat(), 'planned'))
     conn.commit(); conn.close()