Errors & Ommision Insurance

Our CC&R's were revised and the section and attachments that specified allocation of assessments were left out. For over 20 years, annual disclosure of % of assessment for each unit was not disclosed,until our new management company took over. The owners then became aware that they were being incorrectly assessed. Since the Revised CC&R's mention an attachment that was attached to the original CC&R's we reverted to the 1st recorded attachment to do a recalculation. One of the two units who now would pay more have retained an attorney and are threatening to sue. Does E&O insurance cover this situation? and what is covered? Thanks!