why I got bad correlation coefficient if I use a wide database ??

I developed a code for the prediction, but the problem is when I work with a wide database during training I got a bad correlation coefficient.
PS:I have 7 inputs and one ouputs

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Questa domanda è chiusa.

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Richiesto:

il 9 Ott 2015

Chiuso:

il 20 Ago 2021

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