diff --git a/src/interface.jl b/src/interface.jl
index f664e30..6421b1b 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -12,7 +12,6 @@ using JSON3, DataStructures, Dates
 
 @kwdef mutable struct agent
     availableRole=["system", "user", "assistant"]
-    sessionId::Int= 1
     maxUserMsg::Int= 5
 
     """ Dict(Role=> Content)  ;   Role can be system, user, assistant