diff --git a/doc/hs-office-data-structure.md b/doc/hs-office-data-structure.md
index 56467c5d..960e572b 100644
--- a/doc/hs-office-data-structure.md
+++ b/doc/hs-office-data-structure.md
@@ -66,7 +66,7 @@ classDiagram
         +Numeric partnerNumber: 12345
         +Role partnerRole
     }
-    partner-MeierGmbH o-- role-MeierGmbH
+    partner-MeierGmbH *-- role-MeierGmbH
 
     class person-MeierGmbH {
         +personType: LEGAL
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionEntity.java b/src/main/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionEntity.java
index 41e5710f..67e46c80 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionEntity.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/office/coopassets/HsOfficeCoopAssetsTransactionEntity.java
@@ -1,3 +1,4 @@
+
 package net.hostsharing.hsadminng.hs.office.coopassets;
 
 import lombok.*;
@@ -14,6 +15,7 @@ import java.text.DecimalFormat;
 import java.time.LocalDate;
 import java.util.UUID;
 
+import static java.util.Optional.ofNullable;
 import static net.hostsharing.hsadminng.stringify.Stringify.stringify;
 
 @Entity
@@ -27,7 +29,7 @@ import static net.hostsharing.hsadminng.stringify.Stringify.stringify;
 public class HsOfficeCoopAssetsTransactionEntity implements Stringifyable, HasUuid {
 
     private static Stringify<HsOfficeCoopAssetsTransactionEntity> stringify = stringify(HsOfficeCoopAssetsTransactionEntity.class)
-            .withProp(e -> e.getMembership().getMemberNumberSuffix())
+            .withProp(e -> ofNullable(e.getMembership()).map(HsOfficeMembershipEntity::getMemberNumberSuffix).orElse(null))
             .withProp(HsOfficeCoopAssetsTransactionEntity::getValueDate)
             .withProp(HsOfficeCoopAssetsTransactionEntity::getTransactionType)
             .withProp(HsOfficeCoopAssetsTransactionEntity::getAssetValue)
@@ -55,7 +57,7 @@ public class HsOfficeCoopAssetsTransactionEntity implements Stringifyable, HasUu
     private BigDecimal assetValue;
 
     @Column(name = "reference")
-    private String reference;
+    private String reference; // TODO: what is this for?
 
     @Column(name = "comment")
     private String comment;
diff --git a/src/main/java/net/hostsharing/hsadminng/hs/office/coopshares/HsOfficeCoopSharesTransactionEntity.java b/src/main/java/net/hostsharing/hsadminng/hs/office/coopshares/HsOfficeCoopSharesTransactionEntity.java
index bf52837f..ec54255e 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/office/coopshares/HsOfficeCoopSharesTransactionEntity.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/office/coopshares/HsOfficeCoopSharesTransactionEntity.java
@@ -51,7 +51,7 @@ public class HsOfficeCoopSharesTransactionEntity implements Stringifyable, HasUu
     private int shareCount;
 
     @Column(name = "reference")
-    private String reference;
+    private String reference; // TODO: what is this for?
 
     @Column(name = "comment")
     private String comment;
diff --git a/src/main/resources/db/changelog/240-hs-office-bankaccount.sql b/src/main/resources/db/changelog/240-hs-office-bankaccount.sql
index bf3ed342..427b0199 100644
--- a/src/main/resources/db/changelog/240-hs-office-bankaccount.sql
+++ b/src/main/resources/db/changelog/240-hs-office-bankaccount.sql
@@ -6,7 +6,7 @@
 create table hs_office_bankaccount
 (
     uuid                uuid unique references RbacObject (uuid) initially deferred,
-    holder              varchar(27) not null,
+    holder              varchar(64) not null,
     iban                varchar(34) not null,
     bic                 varchar(11) not null
 );
diff --git a/src/main/resources/db/changelog/320-hs-office-coopassets.sql b/src/main/resources/db/changelog/320-hs-office-coopassets.sql
index db76d95b..9a712f3a 100644
--- a/src/main/resources/db/changelog/320-hs-office-coopassets.sql
+++ b/src/main/resources/db/changelog/320-hs-office-coopassets.sql
@@ -10,7 +10,8 @@ CREATE TYPE HsOfficeCoopAssetsTransactionType AS ENUM ('ADJUSTMENT',
                                                        'TRANSFER',
                                                        'ADOPTION',
                                                        'CLEARING',
-                                                       'LOSS');
+                                                       'LOSS',
+                                                       'LIMITATION');
 
 CREATE CAST (character varying as HsOfficeCoopAssetsTransactionType) WITH INOUT AS IMPLICIT;