The first possibility: this QR code contains special characters or strings, and the management software will process the data first after receiving it. However, some special characters cannot be entered or are incorrect when entered manually, so they cannot be entered manually.
Solution: You can only buy a scanning gun or change management software.
The second possibility: your management software receives data directly from the serial scanning gun. Probably because there are Chinese characters in your QR code.
Solution: Buy a two-dimensional scanning gun with a serial port. Or change the management software.