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OPA1692: OPA1692 Gain issue with high feedback resistor

Part Number: OPA1692

Hi, I've got 4 pieces of OPA1692. After simulating the circuit on TINA, I implemented the physical circuit. The problem is the gain: Theoretically and on TINA the result was the same G=49.24dB, but in the practical circuit the result was too far, G=45.9dB (more than 3 dB less). I checked all the components and connections (measuring all the resistor values) with no success. The only thing I imagine could result this discrepance is the feedback loop resistor too close to the input impedance (R = 237KOHM). The input impedance is 350KOHM. Is that statement correct? The ciruit is below:

And how to solve the gain issue?

My best regards,

Rubens Moreno