diff --git a/pom.xml b/pom.xml
index 5f2de9983dfb3ebed941fcb6756687ac7ebf8e01..50994c9684394a6278e89112594c108efdb4bcc9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,7 +25,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.caosdb</groupId>
   <artifactId>caosdb-server</artifactId>
-  <version>0.5.0-GRPC0.0.15</version>
+  <version>0.5.0-GRPC0.0.16</version>
   <packaging>jar</packaging>
   <name>CaosDB Server</name>
   <scm>
diff --git a/src/main/java/org/caosdb/server/grpc/EntityTransactionServiceImpl.java b/src/main/java/org/caosdb/server/grpc/EntityTransactionServiceImpl.java
index f125925b4ece4727c07863dcbfda3818aa7fbbdf..d0c659679390fa0dbf2ff3f939b7062c38a63f90 100644
--- a/src/main/java/org/caosdb/server/grpc/EntityTransactionServiceImpl.java
+++ b/src/main/java/org/caosdb/server/grpc/EntityTransactionServiceImpl.java
@@ -7,8 +7,6 @@ import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.UUID;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
 import org.apache.shiro.SecurityUtils;
 import org.caosdb.api.entity.v1alpha1.AtomicDataType;
 import org.caosdb.api.entity.v1alpha1.CollectionValues;