MISRA-C error in struct array initialization

I have the following:

typedef struct
{
   uint8_t BlockID;
   uint32_t Copies;
   uint16_t Size;
}NVMM_ConfigType;

const NVMM_ConfigType NvmmCnf_Layout[6] =
{
   {  1, 1,   4},
   {  2, 3,   4},
   {  5, 5,  16},
   { 10, 1,   4},
   { 11, 2,  32},
   { 13, 1, 100},
};

Which seems fine to me, but, MISRA-C is giving the following error:

MISRA-C rule 10.3 violation: [R] The value of an expression shall not be assigned to an object with a narrower essential type or of a different essential type category

I've tried to figure out why is this happening but I just can see it. Also the build results are plagued with this errors on similar situations and I dont know why.

Does anybody know what's going on?

Regards.