diff --git a/hapi-fhir-base/src/main/java/ca/uhn/fhir/util/VersionEnum.java b/hapi-fhir-base/src/main/java/ca/uhn/fhir/util/VersionEnum.java
index 0d425b458d2..603483a6593 100644
--- a/hapi-fhir-base/src/main/java/ca/uhn/fhir/util/VersionEnum.java
+++ b/hapi-fhir-base/src/main/java/ca/uhn/fhir/util/VersionEnum.java
@@ -75,6 +75,7 @@ public enum VersionEnum {
 	V5_4_1,
 	V5_4_2,
 	V5_5_0,
+	V5_5_1,
 	V5_6_0
 
 	;
diff --git a/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/5_5_1/version.yaml b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/5_5_1/version.yaml
new file mode 100644
index 00000000000..41c2e9375cf
--- /dev/null
+++ b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/5_5_1/version.yaml
@@ -0,0 +1,3 @@
+---
+release-date: "2021-08-30"
+codename: "Quasar"
diff --git a/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/5_6_0/2933-fix-double-conditional-create.yaml b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/5_6_0/2933-fix-double-conditional-create.yaml
index 49727c0125c..b43658c202a 100644
--- a/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/5_6_0/2933-fix-double-conditional-create.yaml
+++ b/hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/5_6_0/2933-fix-double-conditional-create.yaml
@@ -1,6 +1,7 @@
 ---
 type: add
 issue: 2933
+backport: 5.5.1
 jira: SMILE-3056
 title: "Fixed a regression which causes transactions with multiple identical ifNoneExist clauses to create duplicate data."