diff --git a/python/sdssdb/peewee/sdss5db/targetdb.py b/python/sdssdb/peewee/sdss5db/targetdb.py
index eb6c5095..35bfd206 100644
--- a/python/sdssdb/peewee/sdss5db/targetdb.py
+++ b/python/sdssdb/peewee/sdss5db/targetdb.py
@@ -11,7 +11,7 @@
                     ManyToManyField, SmallIntegerField, TextField)
 from playhouse.postgres_ext import ArrayField
 
-from . import BaseModel, database  # noqa
+from . import BaseModel, catalogdb, database  # noqa
 
 
 class TargetdbBase(BaseModel):
@@ -40,7 +40,7 @@ class Cadence(TargetdbBase):
     delta_max = ArrayField(field_class=FloatField, null=True)
     delta_min = ArrayField(field_class=FloatField, null=True)
     instrument_pk = ArrayField(field_class=IntegerField, null=True)
-    label = TextField(null=True)
+    label = TextField(null=False)
     nexposures = SmallIntegerField(null=True)
     pk = AutoField()
     skybrightness = ArrayField(field_class=FloatField, null=True)
@@ -166,14 +166,12 @@ class Meta:
 class Program(TargetdbBase):
     category = ForeignKeyField(column_name='category_pk',
                                field='pk',
-                               model=Category,
-                               null=True)
-    label = TextField(null=True)
+                               model=Category)
+    label = TextField()
     pk = AutoField()
     survey = ForeignKeyField(column_name='survey_pk',
                              field='pk',
-                             model=Survey,
-                             null=True)
+                             model=Survey)
     version = ForeignKeyField(column_name='version_pk',
                               field='pk',
                               model=Version)
@@ -183,7 +181,10 @@ class Meta:
 
 
 class Target(TargetdbBase):
-    catalogid = BigIntegerField(null=True)
+    catalog = ForeignKeyField(column_name='catalogid',
+                              object_id_name='catalogid',
+                              model=catalogdb.Catalog,
+                              field='catalogid')
     dec = DoubleField(null=True)
     epoch = FloatField(null=True)
     magnitude = ForeignKeyField(column_name='magnitude_pk',
@@ -204,15 +205,9 @@ class Target(TargetdbBase):
     instruments = ManyToManyField(Instrument,
                                   through_model=AssignmentDeferred,
                                   backref='targets')
-    programs = ManyToManyField(Program,
-                               through_model=ProgramToTargetDeferred,
-                               backref='targets')
     cadences = ManyToManyField(Cadence,
                                through_model=ProgramToTargetDeferred,
                                backref='targets')
-    versions = ManyToManyField(Version,
-                               through_model=ProgramToTargetDeferred,
-                               backref='targets')
     parallax = FloatField(null=True)
 
     class Meta:
@@ -251,11 +246,6 @@ class ProgramToTarget(TargetdbBase):
                              column_name='target_pk',
                              field='pk',
                              on_delete='CASCADE')
-    version = ForeignKeyField(Version,
-                              column_name='version_pk',
-                              field='pk',
-                              null=True,
-                              on_delete='CASCADE')
 
     class Meta:
         table_name = 'program_to_target'
diff --git a/schema/sdss5db/targetdb/targetdb.sql b/schema/sdss5db/targetdb/targetdb.sql
index 3e4ba463..dcf621d9 100644
--- a/schema/sdss5db/targetdb/targetdb.sql
+++ b/schema/sdss5db/targetdb/targetdb.sql
@@ -57,12 +57,11 @@ CREATE TABLE targetdb.program_to_target (
 	lambda_eff REAL,
 	program_pk SMALLINT,
 	target_pk BIGINT,
-    version_pk SMALLINT,
 	cadence_pk SMALLINT);
 
 CREATE TABLE targetdb.cadence (
     pk SERIAL PRIMARY KEY NOT NULL,
-    label TEXT,
+    label TEXT NOT NULL,
     nexposures SMALLINT,
     delta REAL[],
     skybrightness REAL[],
@@ -176,11 +175,6 @@ ALTER TABLE ONLY targetdb.program_to_target
     FOREIGN KEY (cadence_pk) REFERENCES targetdb.cadence(pk)
     ON UPDATE CASCADE ON DELETE CASCADE;
 
-ALTER TABLE ONLY targetdb.program_to_target
-    ADD CONSTRAINT version_pk_fk
-    FOREIGN KEY (version_pk) REFERENCES targetdb.version(pk)
-    ON UPDATE CASCADE ON DELETE CASCADE;
-
 ALTER TABLE ONLY targetdb.assignment
     ADD CONSTRAINT target_fk
     FOREIGN KEY (target_pk) REFERENCES targetdb.target(pk)
@@ -253,7 +247,6 @@ CREATE INDEX CONCURRENTLY category_pk_idx ON targetdb.program using BTREE(catego
 CREATE INDEX CONCURRENTLY program_pk_idx ON targetdb.program_to_target using BTREE(program_pk);
 CREATE INDEX CONCURRENTLY target_pk_idx ON targetdb.program_to_target using BTREE(target_pk);
 CREATE INDEX CONCURRENTLY cadence_pk_idx ON targetdb.program_to_target using BTREE(cadence_pk);
-CREATE INDEX CONCURRENTLY version_pk_idx ON targetdb.program_to_target using BTREE(version_pk);
 
 CREATE INDEX CONCURRENTLY assignment_target_pk_idx ON targetdb.assignment using BTREE(target_pk);
 CREATE INDEX CONCURRENTLY positioner_pk_idx ON targetdb.assignment using BTREE(positioner_pk);