diff --git a/examples/power/conf/files/cifar.yaml b/examples/power/conf/files/cifar.yaml
index 2a6598ec..2c7636a6 100644
--- a/examples/power/conf/files/cifar.yaml
+++ b/examples/power/conf/files/cifar.yaml
@@ -1,16 +1,16 @@
 _target_: deckard.base.files.FileConfig
 reports: reports
 data_dir: data
-model_dir: models
+model_dir: null
 attack_dir: attacks
 directory: /result/cifar/
 score_dict_file: score_dict.json
 data_file : data
-model_file : model
+model_file : null
 attack_file : attack
 attack_type : .pkl
 data_type : .pkl
-model_type : .pt
+model_type : null
 params_file : params.yaml
 # train_labels_file : train_labels.json
 # test_labels_file : test_labels.json
diff --git a/examples/power/conf/files/cifar100.yaml b/examples/power/conf/files/cifar100.yaml
index e9a11634..5674932d 100644
--- a/examples/power/conf/files/cifar100.yaml
+++ b/examples/power/conf/files/cifar100.yaml
@@ -1,16 +1,16 @@
 _target_: deckard.base.files.FileConfig
 reports: reports
 data_dir: data
-model_dir: models
+model_dir: null
 attack_dir: attacks
 directory: /result/cifar100/
 score_dict_file: score_dict.json
 data_file : data
-model_file : model
+model_file : null
 attack_file : attack
 attack_type : .pkl
 data_type : .pkl
-model_type : .pt
+model_type : null
 params_file : params.yaml
 # train_labels_file : train_labels.json
 # test_labels_file : test_labels.json
diff --git a/examples/power/conf/files/mnist.yaml b/examples/power/conf/files/mnist.yaml
index 09d39bb7..d45b1926 100644
--- a/examples/power/conf/files/mnist.yaml
+++ b/examples/power/conf/files/mnist.yaml
@@ -1,16 +1,16 @@
 _target_: deckard.base.files.FileConfig
 reports: reports
 data_dir: data
-model_dir: models
+model_dir: null
 attack_dir: attacks
 directory: /result/mnist/
 score_dict_file: score_dict.json
 data_file : data
-model_file : model
+model_file : null
 attack_file : attack
 attack_type : .pkl
 data_type : .pkl
-model_type : .pt
+model_type : null
 params_file : params.yaml
 # train_labels_file : train_labels.json
 # test_labels_file : test_labels.json
diff --git a/examples/power/conf/model/art/initialize/default.yaml b/examples/power/conf/model/art/initialize/default.yaml
index becd0f9a..6cd286df 100644
--- a/examples/power/conf/model/art/initialize/default.yaml
+++ b/examples/power/conf/model/art/initialize/default.yaml
@@ -4,5 +4,4 @@ optimizer:
     name : torch.optim.SGD
     lr : 0.01
     momentum : 0.9
-clip_values : [0, 255]
-device_type : ${oc.env:DECKARD_DEVICE_TYPE,cpu}
+clip_values : [0, 255]
\ No newline at end of file
diff --git a/examples/power/dvc.lock b/examples/power/dvc.lock
index 49bf8b09..9e991ad0 100644
--- a/examples/power/dvc.lock
+++ b/examples/power/dvc.lock
@@ -32,7 +32,7 @@ stages:
           data_file: data
           data_type: .pkl
           directory: mnist
-          model_dir: models
+          model_dir: null
           model_file: model
           model_type: .pt
           name: default
@@ -292,7 +292,7 @@ stages:
           data_file: data
           data_type: .pkl
           directory: mnist
-          model_dir: models
+          model_dir: null
           model_file: model
           model_type: .pt
           name: default