4452d530_able___FreeSWITCH___Confluence__Description
[ITU-T Q.850 Code] 98 [Enumeration] WRONG_MESSAGE [Cause] message not compatible with call state or message type non-existent or not implemented. [Q.850] [Description] 
This cause indicates that the equipment sending this cause has received a message such that the procedures do not indicate that this is a permissible message to receive while in the call state, or a STATUS message was received indicating an incompatible call state.
Hangup Cause Code Table - FreeSWITCH - Confluence
Description