HandiTax - SBR error IITR.310068

Error IITR.310068 generally appears when item 18 in main form I has been overwritten with a different value to what is being reported in the Capital Gains Worksheet and CGT Schedule.
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Ensure that item 18 Label G 'Did you have a capital gains tax event during the year?' is answered Y and that labels M, H, V, X or have been over-written.