mimic joint will not initialize dynamics solver

[zp2546265641]

[ERROR] [1719833344.944049040]: Group 'l_index' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944094085]: Group 'l_middle' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944109945]: Group 'l_pinkly' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944119533]: Group 'l_ring' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944127728]: Group 'l_thumb' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944257012]: Group 'r_index' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944266710]: Group 'r_middle' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944276679]: Group 'r_pinkly' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944283121]: Group 'r_ring' has a mimic joint. Will not initialize dynamics solver
[ERROR] [1719833344.944289653]: Group 'r_thumb' has a mimic joint. Will not initialize dynamics solver
my moveit demo.launch file gives such error, but i do not know which cause it. do you know something about such error?

i use such plugin in urdf as follows

<joint name="L_thumb_intermediate_joint" type="revolute">
   <origin xyz="0.04407 -0.034553 -0.0008" rpy="0 0 0" />
   <parent link="L_thumb_proximal" />
   <child link="L_thumb_intermediate" />
   <axis xyz="0 0 -1" />
   <limit lower="0" upper="0.8" effort="1" velocity="0.5" />
   <mimic joint="L_thumb_proximal_pitch_joint" />
   <!-- multiplier="1.6" offset="0" -->
</joint>
.....................
<gazebo>
     <!-- loading plugin: mimic joints works in gazebo now -->
     <plugin filename="libroboticsgroup_upatras_gazebo_mimic_joint_plugin.so.so" name="mimic_1">
         <joint>L_thumb_proximal_pitch_joint</joint>
         <mimicJoint>L_thumb_intermediate_joint</mimicJoint>
         <multiplier>1.6</multiplier>
         <offset>0.0</offset>
     </plugin>
     <plugin filename="libroboticsgroup_upatras_gazebo_mimic_joint_plugin.so.so" name="mimic_2">
         <joint>R_thumb_proximal_pitch_joint</joint>
         <mimicJoint>R_thumb_intermediate_joint</mimicJoint>
         <multiplier>1.6</multiplier>
         <offset>0.0</offset>
     </plugin>
     <plugin filename="libroboticsgroup_upatras_gazebo_mimic_joint_plugin.so.so" name="mimic_3">
         <joint>L_thumb_proximal_pitch_joint</joint>
         <mimicJoint>L_thumb_distal_joint</mimicJoint>
         <multiplier>2.40</multiplier>
         <offset>0.0</offset>
     </plugin>
     ^^^^^^^^^^^^^^^^^^^^
  </gazebo>

  what's more, i have set the mimic joints such as 

L_thumb_intermediate_joint

as passive joints in moveit.just because:https://answers.ros.org/question/220354/error-group-has-mimic-joint-will-not-initialize-dynamics-solver/
but i have not seen some helpful solutions! i hope some help! Thanks very much!