diff --git a/decnet/web/db/models/orchestrator.py b/decnet/web/db/models/orchestrator.py
index ac71b7ba..5d217eab 100644
--- a/decnet/web/db/models/orchestrator.py
+++ b/decnet/web/db/models/orchestrator.py
@@ -41,12 +41,14 @@ class OrchestratorEvent(SQLModel, table=True):
     kind: str = Field(index=True, max_length=16)              # traffic|file
     protocol: str = Field(index=True, max_length=16)          # ssh for MVP
     action: str = Field(max_length=64)                         # exec:uptime|file:create|...
-    src_decky_uuid: Optional[str] = Field(
-        default=None, foreign_key="topology_deckies.uuid", index=True
-    )
-    dst_decky_uuid: str = Field(
-        foreign_key="topology_deckies.uuid", index=True
-    )
+    # No FK to topology_deckies: dst/src may be a TopologyDecky.uuid
+    # (MazeNET source), a "host_uuid:name" composite (fleet / SWARM shard
+    # sources), or — for retired deckies — a row that's already gone.  The
+    # column is an opaque identifier matching whatever
+    # ``BaseRepository.list_running_deckies`` emits in its ``uuid`` field.
+    # Index is kept; the FK was misleading and broke fleet-source events.
+    src_decky_uuid: Optional[str] = Field(default=None, index=True)
+    dst_decky_uuid: str = Field(index=True)
     success: bool = Field(default=False, index=True)
     payload: str = Field(
         sa_column=Column("payload", Text, nullable=False, default="{}")