invalid datatype

[MuhmdHsn313]

I try to use auto-migrate for the vendor table, but there is a problem with creating it.
This is the model that I wrote:

type Vendor struct {
	ID        uint                     `json:"id" gorm:"primaryKey"`
	CreatedAt time.Time                `json:"created_at" gorm:"not null;autoCreateTime"`
	UpdatedAt time.Time                `json:"updated_at" gorm:"not null;autoUpdateTime:milli"`
	DeletedAt gorm.DeletedAt           `json:"deleted_at" gorm:"index"`
	Logo        string                 `json:"logo" gorm:"not null;type:VARCHAR2(50)"`
	Link        datatypes.URL          `json:"link"`
	IsPublished datatypes.Publishable  `json:"is_published"`
}

both datatypes.URL & datatypes.Publishable are custom gorm datatypes.

This is the DB log:

[3.119ms] [rows:0] CREATE TABLE VENDORS (ID INTEGER,CREATED_AT TIMESTAMP WITH TIME ZONE NOT NULL,UPDATED_AT TIMESTAMP WITH TIME ZONE NOT NULL,DELETED_AT TIMESTAMP WITH TIME ZONE,LOGO VARCHAR2(50) NOT NULL,LINK TEXT,IS_PUBLISHED SMALLINT,PRIMARY KEY (ID))

This is the go error:

[FTAL] 2023/03/05 13:42 ORA-00902: invalid datatype