diff --git a/src/models/DistanceDonation.ts b/src/models/DistanceDonation.ts
index 55236d1..878f8cb 100644
--- a/src/models/DistanceDonation.ts
+++ b/src/models/DistanceDonation.ts
@@ -12,7 +12,6 @@ export class DistanceDonation extends Donation {
   /**
    * The runner associated.
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => Runner, runner => runner.distanceDonations)
   runner: Runner;
diff --git a/src/models/Donation.ts b/src/models/Donation.ts
index f7ea19c..3d59202 100644
--- a/src/models/Donation.ts
+++ b/src/models/Donation.ts
@@ -22,7 +22,6 @@ export abstract class Donation {
   /**
    * The donations's donor.
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => Participant, donor => donor.donations)
   donor: Participant;
diff --git a/src/models/Participant.ts b/src/models/Participant.ts
index e70e14e..0465e01 100644
--- a/src/models/Participant.ts
+++ b/src/models/Participant.ts
@@ -51,7 +51,6 @@ export abstract class Participant {
    * The participant's address.
    * Optional
    */
-  @Column()
   @IsOptional()
   @ManyToOne(() => Address, address => address.participants)
   address?: Address;
diff --git a/src/models/Runner.ts b/src/models/Runner.ts
index bb0047a..3a8532a 100644
--- a/src/models/Runner.ts
+++ b/src/models/Runner.ts
@@ -14,7 +14,6 @@ export class Runner extends Participant {
   /**
    * The runner's associated group.
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => RunnerGroup, group => group.runners)
   group: RunnerGroup;
diff --git a/src/models/RunnerCard.ts b/src/models/RunnerCard.ts
index b5a3e5a..e751506 100644
--- a/src/models/RunnerCard.ts
+++ b/src/models/RunnerCard.ts
@@ -25,7 +25,6 @@ export class RunnerCard {
   /**
    * The runner that is currently associated with this card.
    */
-  @Column()
   @IsOptional()
   @ManyToOne(() => Runner, runner => runner.cards)
   runner: Runner;
diff --git a/src/models/RunnerGroup.ts b/src/models/RunnerGroup.ts
index 652b861..8f4c5ea 100644
--- a/src/models/RunnerGroup.ts
+++ b/src/models/RunnerGroup.ts
@@ -33,7 +33,6 @@ export abstract class RunnerGroup {
    * The group's contact.
    * Optional
    */
-  @Column()
   @IsOptional()
   @ManyToOne(() => GroupContact, contact => contact.groups)
   contact?: GroupContact;
diff --git a/src/models/RunnerOrganisation.ts b/src/models/RunnerOrganisation.ts
index d3e4ea8..22fe8a5 100644
--- a/src/models/RunnerOrganisation.ts
+++ b/src/models/RunnerOrganisation.ts
@@ -13,7 +13,6 @@ export class RunnerOrganisation extends RunnerGroup {
    * The organisations's address.
    * Optional
    */
-  @Column()
   @IsOptional()
   @ManyToOne(() => Address, address => address.groups)
   address?: Address;
diff --git a/src/models/RunnerTeam.ts b/src/models/RunnerTeam.ts
index 1799e30..e716e27 100644
--- a/src/models/RunnerTeam.ts
+++ b/src/models/RunnerTeam.ts
@@ -12,7 +12,6 @@ export class RunnerTeam extends RunnerGroup {
    * The team's parent group.
    * Optional
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => RunnerGroup, group => group.teams)
   parentGroup?: RunnerGroup;
diff --git a/src/models/Scan.ts b/src/models/Scan.ts
index 38c18c9..6e3f654 100644
--- a/src/models/Scan.ts
+++ b/src/models/Scan.ts
@@ -23,7 +23,6 @@ export abstract class Scan {
   /**
    * The associated runner.
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => Runner, runner => runner.scans)
   runner: Runner;
diff --git a/src/models/ScanStation.ts b/src/models/ScanStation.ts
index 5950ad0..c89a3a4 100644
--- a/src/models/ScanStation.ts
+++ b/src/models/ScanStation.ts
@@ -33,7 +33,6 @@ export class ScanStation {
   /**
    * The track this station is associated with.
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => Track, track => track.stations)
   track: Track;
diff --git a/src/models/TrackScan.ts b/src/models/TrackScan.ts
index 3691cf1..0f08d2a 100644
--- a/src/models/TrackScan.ts
+++ b/src/models/TrackScan.ts
@@ -20,7 +20,6 @@ export class TrackScan extends Scan {
   /**
    * The associated track.
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => Track, track => track.scans)
   track: Track;
@@ -28,7 +27,6 @@ export class TrackScan extends Scan {
   /**
    * The associated card.
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => RunnerCard, card => card.scans)
   card: RunnerCard;
@@ -36,7 +34,6 @@ export class TrackScan extends Scan {
   /**
    * The scanning station.
    */
-  @Column()
   @IsNotEmpty()
   @ManyToOne(() => ScanStation, station => station.scans)
   station: ScanStation;