diff --git a/src/fiber_package/committee/committee.py b/src/fiber_package/committee/committee.py
index 5c13c65..873927a 100644
--- a/src/fiber_package/committee/committee.py
+++ b/src/fiber_package/committee/committee.py
@@ -1,4 +1,4 @@
-from pydantic import model_validator, UUID7, computed_field
+from pydantic import model_validator, UUID7, computed_field, Field
 
 from fiber_package.refs import (
     CommitteeEditionRef,
@@ -32,7 +32,7 @@ class CommitteeModel(FiberBaseModel):
 
     ldap_id: int | None = None
 
-    editions: CommitteeEditionRefList = CommitteeEditionRefList([])
+    editions: CommitteeEditionRefList = CommitteeEditionRefList([], "committee_edition")
     current_edition: CommitteeEditionRef | None = None
 
     @model_validator(mode='after')
@@ -47,7 +47,7 @@ class CommitteeModel(FiberBaseModel):
 class CommitteeEditionModel(FiberBaseModel):
     collection_name: Literal["committee_edition"] = "committee_edition"
 
-    members: EntityRefList = EntityRefList([])
+    members: EntityRefList = EntityRefList([], "entity")
     functions: dict[UUID7, str] = Field(default_factory=dict)
 
     remarks: str = ""
diff --git a/src/fiber_package/guild/guild.py b/src/fiber_package/guild/guild.py
index 6d520fb..82c6534 100644
--- a/src/fiber_package/guild/guild.py
+++ b/src/fiber_package/guild/guild.py
@@ -28,8 +28,8 @@ class GuildModel(FiberBaseModel):
 
     ldap_id: int | None = None
 
-    members: EntityRefList = EntityRefList([])
-    previous_members: EntityRefList = EntityRefList([])
+    members: EntityRefList = EntityRefList([], "entity")
+    previous_members: EntityRefList = EntityRefList([], "entity")
     guild_masters: list[UUID7] = Field(default_factory=list)
 
     last_active: dict[UUID7, date] = Field(default_factory=dict)
diff --git a/src/fiber_package/refs.py b/src/fiber_package/refs.py
index c97546f..6032df2 100644
--- a/src/fiber_package/refs.py
+++ b/src/fiber_package/refs.py
@@ -1,4 +1,4 @@
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from pydantic import UUID7
 from typing import Literal, TypeVar
 from collections.abc import Iterator
@@ -6,7 +6,13 @@ from collections.abc import Iterator
 '''
 CollectionName provides the list of all allowed collections!
 '''
-CollectionName = Literal["system", "entity", "committee", "committee_edition", "guild"]
+CollectionName = Literal[
+    "association",
+    "entity",
+    "committee",
+    "committee_edition",
+    "guild"
+]
 
 C = TypeVar("C", bound=str)