Glitch in automobile manufacuting

Hi there,
there is a glitch in the manufacuting unit. There is wrong information being displayed on the units produced. Earlier it was showing that 10 units have been produced but when i tried shipping it then it could only ship 7. After 5 mins i checked againg it was showing 11 units produced and when i tried shipping its saying no invetory to be shipped

please check that out and let me know

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