Note that simultaneous FORWARD and ACCEPT is disallowed

i2p2www/pages/site/docs/api/samv3.html

@@ -531,6 +531,7 @@ sending the STREAM ACCEPT command
 </p><p>
 This makes the session ${nickname} listen for one incoming
 connection request from the I2P network.
+ACCEPT is not allowed while there is an active FORWARD on the session.
 </p><p>
 As of SAM 3.2,
 multiple concurrent pending STREAM ACCEPTs are allowed on the same session ID (even with the same port).
@@ -623,6 +624,7 @@ send the forward command
 </p><p>
 This makes the session ${nickname} listen for incoming
 connection requests from the I2P network.
+FORWARD is not allowed while there is a pending ACCEPT on the session.
 </p>
 
 <h4>Forward Response</h4>