"It is not possible to unreserve more products of <product name> than you have in stock"
Sometimes, the reserved_quantity on the stock.quant record for a product becomes out-of-sync with the sum of the reserved quantity in stock.move.lines for that product.
For example, consider:
- Product A (quant): on-hand = 50, reserved = 10
- Picking A (move): reserved = 10
- Picking B (move): reserved = 5