Facing Error while migrate from LN to O365 SP lists -Error Writing List item

Doing LN to O365 (SP lists) Migration by Quest tool. Facing this issue while migrate records with attachments in target SP site . Even empty the recycle bin from Top level site but still facing this issue, Pls provide some inputs or solution to fix this issue.

Detail Error Description:
Error Writing List item: Attachments. This Site has exceeded its maximum file storage limit.
To free up sapce, delete files you donot need any empty the recyle bin.