diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1cd3572c8..2c72359fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 1.6.1
+
+### Bug Fixes:
+ * fix an error causing the webui to fail to start ([#13839](https://github.com/AUTOMATIC1111/stable-diffusion-webui/pull/13839))
+
 ## 1.6.0
 
 ### Features:
diff --git a/modules/sd_hijack.py b/modules/sd_hijack.py
index bc5fbcd3f..4fff418d7 100644
--- a/modules/sd_hijack.py
+++ b/modules/sd_hijack.py
@@ -183,6 +183,18 @@ class StableDiffusionModelHijack:
         except Exception as e:
             errors.display(e, "applying cross attention optimization")
             undo_optimizations()
+            
+    def conv_ssd(self, m):
+            delattr(m.model.diffusion_model.middle_block, '1')
+            delattr(m.model.diffusion_model.middle_block, '2')
+            for i in ['9','8','7','6','5','4']:
+                delattr(m.model.diffusion_model.input_blocks[7][1].transformer_blocks,i)
+                delattr(m.model.diffusion_model.input_blocks[8][1].transformer_blocks,i)
+                delattr(m.model.diffusion_model.output_blocks[0][1].transformer_blocks,i)
+                delattr(m.model.diffusion_model.output_blocks[1][1].transformer_blocks,i)
+            delattr(m.model.diffusion_model.output_blocks[4][1].transformer_blocks,'1')
+            delattr(m.model.diffusion_model.output_blocks[5][1].transformer_blocks,'1')
+            devices.torch_gc()
 
     def hijack(self, m):
         conditioner = getattr(m, 'conditioner', None)
diff --git a/modules/sd_models.py b/modules/sd_models.py
index 3b6cdea18..d76dc5803 100644
--- a/modules/sd_models.py
+++ b/modules/sd_models.py
@@ -352,10 +352,13 @@ def load_model_weights(model, checkpoint_info: CheckpointInfo, state_dict, timer
     model.is_sdxl = hasattr(model, 'conditioner')
     model.is_sd2 = not model.is_sdxl and hasattr(model.cond_stage_model, 'model')
     model.is_sd1 = not model.is_sdxl and not model.is_sd2
-
+    model.is_ssd = model.is_sdxl and 'model.diffusion_model.middle_block.1.transformer_blocks.0.attn1.to_q.weight' not in state_dict.keys()
     if model.is_sdxl:
         sd_models_xl.extend_sdxl(model)
-
+    
+    if model.is_ssd:
+        sd_hijack.model_hijack.conv_ssd(model)
+        
     if shared.opts.sd_checkpoint_cache > 0:
         # cache newly loaded model
         checkpoints_loaded[checkpoint_info] = state_dict.copy()
diff --git a/modules/sd_models_types.py b/modules/sd_models_types.py
index 5ffd2f4f9..1f28942a4 100644
--- a/modules/sd_models_types.py
+++ b/modules/sd_models_types.py
@@ -22,7 +22,10 @@ class WebuiSdModel(LatentDiffusion):
     """structure with additional information about the file with model's weights"""
 
     is_sdxl: bool
-    """True if the model's architecture is SDXL"""
+    """True if the model's architecture is SDXL or SSD"""
+    
+    is_ssd: bool
+    """True if the model is SSD"""
 
     is_sd2: bool
     """True if the model's architecture is SD 2.x"""