Error when creating new adoptables

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You can check your database table adopts_adoptables_conditions, and for column 'number'. If this value is empty, check the 'null' checkboxes and make it null(or you can make it value 0 since the number does not matter). An empty string is an invalid value for integer column, it must be a number of null.

Edit: I am looking into your website now and I will see if I can find out anything.