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We evaluate the backreaction of O6-planes in scale-separated $\text{AdS}_3$flux vacua of massive Type IIA. Using the appropriate flux scaling we show thatthe corrections to the various background fields and moduli are controlled andsubleading when going from smeared to localized sources. Similarly, thebackreaction corrections to the scalar potential are parametrically small inthe scale-separation limit, assuming always that the near-O6-planesingularities will find a resolution within string theory, even in the presenceof a Romans mass. Our analysis is based on the equations of motion andtherefore applies also to the non-supersymmetric vacua.

O6-plane backreaction on scale-separated Type IIA AdS$_3$ vacua