Why can't I update my cydia on my iPhone?

It says I have 7 updates in cydia. Then I go try to update them and it updates and downloads, but at the very end it says "size mismatch." Help! What do I do?

Install them separately, one at a time.

Here's a trick when it says respring press the home button to get to the home screen and press it again twice to turn off the app ( press x on it, then open cydia again and keep installing the apps) then when you're ready reboot the device yourself. ( Hold the power button, and slide to power off then press it again to turn it back on)

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