diff --git a/README.md b/README.md
index 1106e9da..c184591f 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,6 @@ To be able to build and run the Java Spring Boot application, you need the follo
   (see instructions below to install and run in Docker)
 - Java JDK at least recent enough to run Gradle
   (JDK 17.x will be automatically installed by Gradle toolchain support)
-- Gradle in some not too outdated version (7.4 will be installed via wrapper)
 
 You also might need an IDE (e.g. *IntelliJ IDEA* or *Eclipse* or *VS Code* with *[STS](https://spring.io/tools)* and a GUI Frontend for *PostgreSQL* like *Postbird*.
 
@@ -62,12 +61,16 @@ If you have at least Docker, the Java JDK and Gradle installed in appropriate ve
 
     cd your-hsadmin-ng-directory
     
-    gradle wrapper  # downloads the configured Gradle version into the project
-    source .aliases # creates some comforable bash aliases, e.g. 'gw'='./gradlew'
+    source .aliases # creates some comfortable bash aliases, e.g. 'gw'='./gradlew'
+    gw  # downloads the configured Gradle version into the project
 
     gw test         # compiles and runs unit- and integration-tests
     
+    # if the container has not been built yet, run this:
     pg-sql-run      # downloads + runs PostgreSQL in a Docker container on localhost:5432
+    # if the container has been built already, run this:
+    pg-sql-start
+
     gw bootRun      # compiles and runs the application on localhost:8080
 
     # the following command should reply with "pong":
diff --git a/build.gradle b/build.gradle
index 29ad0e23..1be9d95f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -67,6 +67,7 @@ dependencies {
     implementation 'org.apache.commons:commons-text:1.10.0'
     implementation 'org.modelmapper:modelmapper:3.1.0'
     implementation 'org.iban4j:iban4j:3.2.3-RELEASE'
+    implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.2.0'
 
     compileOnly 'org.projectlombok:lombok'
     testCompileOnly 'org.projectlombok:lombok'
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/office/relationship/HsOfficeRelationshipRepository.java b/src/main/java/net/hostsharing/hsadminng/hs/office/relationship/HsOfficeRelationshipRepository.java
index 8b9e10fe..a55f2272 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/office/relationship/HsOfficeRelationshipRepository.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/office/relationship/HsOfficeRelationshipRepository.java
@@ -20,7 +20,7 @@ public interface HsOfficeRelationshipRepository extends Repository<HsOfficeRelat
             SELECT p.* FROM hs_office_relationship_rv AS p
                 WHERE p.relAnchorUuid = :personUuid OR p.relHolderUuid = :personUuid
                """, nativeQuery = true)
-    List<HsOfficeRelationshipEntity> findRelationshipRelatedToPersonUuid(@NotNull UUID personUuid);
+    List<HsOfficeRelationshipEntity> findRelationshipRelatedToPersonUuid2(@NotNull UUID personUuid);
 
     @Query(value = """
             SELECT p.* FROM hs_office_relationship_rv AS p