Change J901 to be a header not a socket.

Author: jonathanpallant

Kicad/expansion_slots.kicad_sch

@@ -4659,7 +4659,7 @@
     (property "Reference" "J901" (id 0) (at 177.8 38.735 0)
       (effects (font (size 1.27 1.27)) (justify right))
     )
-    (property "Value" "Conn_01x06S" (id 1) (at 177.8 41.275 0)
+    (property "Value" "Conn_01x06" (id 1) (at 177.8 41.275 0)
       (effects (font (size 1.27 1.27)) (justify right))
     )
     (property "Footprint" "Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical" (id 2) (at 177.8 43.815 0)

Kicad/neotron-pico.kicad_sch

@@ -2756,7 +2756,7 @@
       (reference "J803") (unit 1) (value "Conn_01x04") (footprint "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical")
     )
     (path "/473239af-77cb-4a8b-b63b-c3d123df75c7/e4a6688a-f469-4bd5-9401-9cc6470c44d1"
-      (reference "J901") (unit 1) (value "Conn_01x06S") (footprint "Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical")
+      (reference "J901") (unit 1) (value "Conn_01x06") (footprint "Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical")
     )
     (path "/473239af-77cb-4a8b-b63b-c3d123df75c7/fb7d92e4-68b6-4d05-8f14-a9bef7d5ad04"
       (reference "J902") (unit 1) (value "Neotron-Expansion-Slot") (footprint "Neotron-Common-Hardware:Neotron-Expansion-Slot")