Copter Mag field

How do I lower the mag field? When I run the Auto Analyzer it shows my mag field very high. see below

Test: Compass = FAIL - WARN: Large compass offset params (X:109.60, Y:-248.49, Z:-321.05)
WARN: Large compass offset in MAG data (X:109.00, Y:-248.00, Z:-321.00)
Large change in mag_field (76.14%)
Max mag field length (722.48) > recommended (550.00)

I have attached my log file.

Twist your wires

Hi Bobby,

If you have a question regarding hardware configuration it’s necessary to provide the following information so we could help you:

  1. Navio2 Image and ArduPilot version.
  2. Detailed problem description. How does observed behavior differ from the expected one?
  3. Your step by step actions.
  4. Picture of the setup and connection scheme.
  5. Exact make and model of additional hardware.
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Hi Bobby,

you may want to look at this - especially towards the bottom:

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