From the (translated) article:

“This position is dissociated from ECOWAS which, even if it continues to favor the « dialogue », ordered ’ « immediate activation of [ sa ] standby force », and it considerably weakens the West African organization”

I think this is how the word “dissociated” bubbled up to the headline, and could be perceived as a misleading translation, as it implies there was some formal rebuke of ECOWAS by the larger AU when there was not.

Still, this is real news and very positive for those who oppose intervention.