diff --git a/balances-adjustment/pom.xml b/balances-adjustment/pom.xml
index a6d7f241..d691f4c5 100644
--- a/balances-adjustment/pom.xml
+++ b/balances-adjustment/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-entsoe</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/cne/cne-converter/pom.xml b/cne/cne-converter/pom.xml
index 556fb388..dbaf0157 100644
--- a/cne/cne-converter/pom.xml
+++ b/cne/cne-converter/pom.xml
@@ -13,7 +13,7 @@
     <parent>
         <artifactId>powsybl-cne</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
 
     <artifactId>powsybl-cne-converter</artifactId>
diff --git a/cne/cne-model/pom.xml b/cne/cne-model/pom.xml
index 0c5829dd..f7db8c77 100644
--- a/cne/cne-model/pom.xml
+++ b/cne/cne-model/pom.xml
@@ -13,7 +13,7 @@
     <parent>
         <artifactId>powsybl-cne</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
 
     <artifactId>powsybl-cne-model</artifactId>
diff --git a/cne/pom.xml b/cne/pom.xml
index 7b4b82ee..691043f8 100644
--- a/cne/pom.xml
+++ b/cne/pom.xml
@@ -13,7 +13,7 @@
     <parent>
         <artifactId>powsybl-entsoe</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
 
     <packaging>pom</packaging>
diff --git a/commons/pom.xml b/commons/pom.xml
index 90d98a22..e195f8f1 100644
--- a/commons/pom.xml
+++ b/commons/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <artifactId>powsybl-entsoe</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
 
     <artifactId>powsybl-entsoe-commons</artifactId>
diff --git a/distribution-entsoe/pom.xml b/distribution-entsoe/pom.xml
index 7938db51..30fe9909 100644
--- a/distribution-entsoe/pom.xml
+++ b/distribution-entsoe/pom.xml
@@ -15,7 +15,7 @@
     <parent>
         <artifactId>powsybl-entsoe</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
 
     <packaging>pom</packaging>
diff --git a/emf/pom.xml b/emf/pom.xml
index 9938ecc3..7f07026f 100644
--- a/emf/pom.xml
+++ b/emf/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-entsoe</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/entsoe-cgmes-balances-adjustment/pom.xml b/entsoe-cgmes-balances-adjustment/pom.xml
index 890e61c1..72bf022a 100644
--- a/entsoe-cgmes-balances-adjustment/pom.xml
+++ b/entsoe-cgmes-balances-adjustment/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-entsoe</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/flow-decomposition/pom.xml b/flow-decomposition/pom.xml
index 45ac3661..056fbb09 100644
--- a/flow-decomposition/pom.xml
+++ b/flow-decomposition/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-entsoe</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/glsk/glsk-commons/pom.xml b/glsk/glsk-commons/pom.xml
index 2ce22eae..8fca32b0 100644
--- a/glsk/glsk-commons/pom.xml
+++ b/glsk/glsk-commons/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <artifactId>powsybl-glsk</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
 
     <artifactId>powsybl-glsk-commons</artifactId>
diff --git a/glsk/glsk-document-api/pom.xml b/glsk/glsk-document-api/pom.xml
index 5aa5834e..35fe01d5 100644
--- a/glsk/glsk-document-api/pom.xml
+++ b/glsk/glsk-document-api/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-glsk</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/glsk/glsk-document-cim/pom.xml b/glsk/glsk-document-cim/pom.xml
index 80d6478f..78af0ae6 100644
--- a/glsk/glsk-document-cim/pom.xml
+++ b/glsk/glsk-document-cim/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-glsk</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/glsk/glsk-document-cse/pom.xml b/glsk/glsk-document-cse/pom.xml
index c0513e77..ca6708f1 100644
--- a/glsk/glsk-document-cse/pom.xml
+++ b/glsk/glsk-document-cse/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-glsk</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/glsk/glsk-document-io-api/pom.xml b/glsk/glsk-document-io-api/pom.xml
index 494ecd47..f41e44bd 100644
--- a/glsk/glsk-document-io-api/pom.xml
+++ b/glsk/glsk-document-io-api/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-glsk</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/glsk/glsk-document-ucte/pom.xml b/glsk/glsk-document-ucte/pom.xml
index 291a89f2..4b228d99 100644
--- a/glsk/glsk-document-ucte/pom.xml
+++ b/glsk/glsk-document-ucte/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>powsybl-glsk</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/glsk/glsk-quality-check-ucte/pom.xml b/glsk/glsk-quality-check-ucte/pom.xml
index 7529f1a8..6a4594e9 100644
--- a/glsk/glsk-quality-check-ucte/pom.xml
+++ b/glsk/glsk-quality-check-ucte/pom.xml
@@ -7,11 +7,11 @@
     <parent>
         <artifactId>powsybl-glsk</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
 
     <artifactId>powsybl-glsk-quality-check-ucte</artifactId>
-    <version>2.7.0-SNAPSHOT</version>
+    <version>2.6.1</version>
     <packaging>jar</packaging>
     <name>GLSK quality check</name>
     <description>GLSK quality check module for UCTE formatted file</description>
diff --git a/glsk/pom.xml b/glsk/pom.xml
index 3651daf9..c0864d45 100644
--- a/glsk/pom.xml
+++ b/glsk/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <artifactId>powsybl-entsoe</artifactId>
         <groupId>com.powsybl</groupId>
-        <version>2.7.0-SNAPSHOT</version>
+        <version>2.6.1</version>
     </parent>
 
     <artifactId>powsybl-glsk</artifactId>
diff --git a/pom.xml b/pom.xml
index 199f1714..c0f4cc0a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,7 +20,7 @@
     </parent>
 
     <artifactId>powsybl-entsoe</artifactId>
-    <version>2.7.0-SNAPSHOT</version>
+    <version>2.6.1</version>
     <packaging>pom</packaging>
 
     <name>ENTSO-E</name>