I created new folder and created first component inside the folder. i got this error in SDL Web8.1. i just want to where can i fixe this issue.
The error is fairly clear... You named your component identically to another existing item in the same folder either in the current Publication or one of it's children. The existing item's ID is tcm:182-128830. You will either need to change your chosen name for the new component or find tcm:182-128830 and change it's name (including the name of any localised versions) before trying again.
If this was genuinely a completely new folder, perhaps you created 2 components by mistake or perhaps there is some automation code at work to cause the naming conflict?