How can I fix tape cassette - tape came loose from post?

Sony tape cassette: C-90HFL; Type 1 Normal Bias
Just bought a package of these cassettes; taped side A; taped on side B, but rewound and tape came loose at post. The tape is retracted to inside the tape case. Don't find any screws to open tape! Can this tape be fixed?? If so, how? - And will it just come loose again when rewound on side B? Is this likely to happen again with the rest of the tapes from the package? Have I just wasted my time and money?

















can this tape