diff --git a/isa/isa.yaml b/isa/isa.yaml
index d187418c9bb32acefa520262e00bb4808a3e409b..c04ea066edf58cc8b8f13c033ff1bdaa4a632711 100644
--- a/isa/isa.yaml
+++ b/isa/isa.yaml
@@ -251,7 +251,7 @@ isa_information:
       last_opcode_idx: 0xd5
       last_throw_prefixed_opcode_idx: 0x08
       last_wide_prefixed_opcode_idx: 0x13
-      last_deprecated_prefixed_opcode_idx: 0x2f
+      last_deprecated_prefixed_opcode_idx: 0x2e
 
 prefixes:
   - name: throw
@@ -1398,11 +1398,6 @@ groups:
         opcode_idx: [0x2e]
         format: [pref_op_v1_8_v2_8]
         prefix: deprecated
-      - sig: deprecated.stlexenv
-        acc: none
-        opcode_idx: [0x2f]
-        format: [pref_op_none]
-        prefix: deprecated
 
   - title: Load accumulator from string constant pool
     description: >