diff --git a/RUN-A-NODE.md b/RUN-A-NODE.md
index 1ecadae..05d9a0f 100644
--- a/RUN-A-NODE.md
+++ b/RUN-A-NODE.md
@@ -228,7 +228,6 @@ export BESU_OPTS="\
 -Daere.falcon.anchor.address=0xC01Bb2843EFAF92D8389F14aC1dD26dbeAf9144C \
 -Daere.falcon.anchor.block=13889290 \
 -Daere.falcon.attachBlock=13889296 \
--Daere.falcon.attachBlockAcknowledgePast=13889296 \
 -Daere.falcon.attachInterval=32 \
 -Daere.falcon.forkBlock=14050000 \
 -Daere.falcon.manifest=$REG/manifest-18082816.json \
diff --git a/SPEC.md b/SPEC.md
index 7af1220..0ca3413 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -431,7 +431,6 @@ passes"):
 -Daere.falcon.anchor.address=0xC01Bb2843EFAF92D8389F14aC1dD26dbeAf9144C
 -Daere.falcon.anchor.block=13889290
 -Daere.falcon.attachBlock=13889296
--Daere.falcon.attachBlockAcknowledgePast=13889296
 -Daere.falcon.attachInterval=32
 -Daere.falcon.forkBlock=14050000
 -Daere.falcon.manifest=<registries>/manifest-18082816.json
diff --git a/run-node.sh b/run-node.sh
index a5d920d..2fdfa80 100644
--- a/run-node.sh
+++ b/run-node.sh
@@ -251,7 +251,6 @@ export BESU_OPTS="\
 -Daere.falcon.anchor.address=0xC01Bb2843EFAF92D8389F14aC1dD26dbeAf9144C \
 -Daere.falcon.anchor.block=13889290 \
 -Daere.falcon.attachBlock=13889296 \
--Daere.falcon.attachBlockAcknowledgePast=13889296 \
 -Daere.falcon.attachInterval=32 \
 -Daere.falcon.forkBlock=14050000 \
 -Daere.falcon.manifest=$REG/manifest-18082816.json \