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LT3022 output is false

The output of LT3022 is designed to 0.85V as follows, but the actual output is 0.911V. Vin is 1.2V from DC-DC. If I remove the R889, the output of LT3022 is 1.143V and the volatge of ADJ is 0.268V.

Then I design it in LTspice XVII and the output is same as designed. (Green is out, blue is ADJ)

Can anyone give me some help?

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