diff --git a/python/lsst/meas/deblender/deblend.py b/python/lsst/meas/deblender/deblend.py
index b1fbf7fb..eeae7f73 100644
--- a/python/lsst/meas/deblender/deblend.py
+++ b/python/lsst/meas/deblender/deblend.py
@@ -502,7 +502,7 @@ class MultibandDeblendConfig(pexConfig.Config):
                                      "This must be between 0 and 1."))
 
     # Constraints
-    constraints = pexConfig.Field(dtype=str, default="1,+,S,M",
+    constraints = pexConfig.Field(dtype=str, default="1,S,M",
                                   doc=("List of constraints to use for each object"
                                        "(order does not matter)"
                                        "Current options are all used by default:\n"
@@ -707,13 +707,12 @@ def __init__(self, schema, peakSchema=None, **kwargs):
         # all of the sources
         constraints = None
         _constraints = self.config.constraints.split(",")
-        if (sorted(_constraints) != ['+', '1', 'M', 'S']
+        if (sorted(_constraints) != ['1', 'M', 'S']
             or ~np.isnan(self.config.l0Thresh)
             or ~np.isnan(self.config.l1Thresh)
         ):
             constraintDict = {
-                "+": scarlet.constraint.PositivityConstraint,
-                "1": scarlet.constraint.SimpleConstraint,
+                "1": scarlet.constraint.SimpleConstraint(),
                 "M": scarlet.constraint.DirectMonotonicityConstraint(use_nearest=False),
                 "S": scarlet.constraint.DirectSymmetryConstraint(sigma=self.config.symmetryThresh)
             }
@@ -927,7 +926,7 @@ def deblend(self, mExposure, sources, psfs):
             fluxCatalogs = {}
             for f in filters:
                 _catalog = afwTable.SourceCatalog(sources.table.clone())
-                _catalog.extend(sources)
+                _catalog.extend(sources, deep=True)
                 fluxCatalogs[f] = _catalog
         else:
             fluxCatalogs = None
@@ -935,7 +934,7 @@ def deblend(self, mExposure, sources, psfs):
             templateCatalogs = {}
             for f in filters:
                 _catalog = afwTable.SourceCatalog(sources.table.clone())
-                _catalog.extend(sources)
+                _catalog.extend(sources, deep=True)
                 templateCatalogs[f] = _catalog
         else:
             templateCatalogs = None
diff --git a/python/lsst/meas/deblender/plugins.py b/python/lsst/meas/deblender/plugins.py
index b0ff223a..6216fae7 100755
--- a/python/lsst/meas/deblender/plugins.py
+++ b/python/lsst/meas/deblender/plugins.py
@@ -238,7 +238,7 @@ def buildMultibandTemplates(debResult, log, useWeights=False, usePsf=False,
     bg_rms = np.array([debResult.deblendedParents[f].avgNoise for f in debResult.filters])*bgScale
     if sources is None:
         # If only a single constraint was given, use it for all of the sources
-        if constraints is None or isinstance(constraints[0], scarlet.constraints.Constraint):
+        if constraints is None or isinstance(constraints[0], scarlet.constraint.Constraint):
             constraints = [constraints] * len(peaks)
         sources = [
             scarlet.source.ExtendedSource(center=peak,